diff --git a/src/forms/Y2021/irsForms/F1040Attachment.ts b/src/forms/Y2021/irsForms/F1040Attachment.ts
index bc160d015..5b3db84e1 100644
--- a/src/forms/Y2021/irsForms/F1040Attachment.ts
+++ b/src/forms/Y2021/irsForms/F1040Attachment.ts
@@ -10,4 +10,12 @@ abstract class F1040Attachment extends Form {
   }
 }
 
+export abstract class Worksheet {
+  f1040: F1040
+
+  constructor(f1040: F1040) {
+    this.f1040 = f1040
+  }
+}
+
 export default F1040Attachment
diff --git a/src/forms/Y2021/irsForms/F2555.ts b/src/forms/Y2021/irsForms/F2555.ts
index 29baf106d..95cae61f5 100644
--- a/src/forms/Y2021/irsForms/F2555.ts
+++ b/src/forms/Y2021/irsForms/F2555.ts
@@ -9,6 +9,9 @@ export default class F2555 extends F1040Attachment {
   tag: FormTag = 'f2555'
   sequenceIndex = 34
 
+  // TODO - Required from SDCapitalGainWorksheet
+  l3 = (): number | undefined => undefined
+
   // TODO - required from 6251
   l36 = (): number => 0
 
diff --git a/src/forms/Y2021/irsForms/F6251.ts b/src/forms/Y2021/irsForms/F6251.ts
index 0b5b83be3..1ef90e1c8 100644
--- a/src/forms/Y2021/irsForms/F6251.ts
+++ b/src/forms/Y2021/irsForms/F6251.ts
@@ -1,12 +1,43 @@
 import F1040Attachment from './F1040Attachment'
 import { FilingStatus, PersonRole } from 'ustaxes/core/data'
 import { FormTag } from 'ustaxes/core/irsForms/Form'
-import SDQualifiedAndCapGains from './worksheets/SDQualifiedAndCapGains'
 import { Field } from 'ustaxes/core/pdfFiller'
 
+type Part3 = Partial<{
+  l12: number
+  l13: number
+  l14: number
+  l15: number
+  l16: number
+  l17: number
+  l18: number
+  l19: number
+  l20: number
+  l21: number
+  l22: number
+  l23: number
+  l24: number
+  l25: number
+  l26: number
+  l27: number
+  l28: number
+  l29: number
+  l30: number
+  l31: number
+  l32: number
+  l33: number
+  l34: number
+  l35: number
+  l36: number
+  l37: number
+  l38: number
+  l39: number
+  l40: number
+}>
+
 export default class F6251 extends F1040Attachment {
   tag: FormTag = 'f6251'
-  sequenceIndex = 72
+  sequenceIndex = 32
 
   isNeeded = (): boolean => {
     // See https://www.irs.gov/instructions/i6251
@@ -209,7 +240,7 @@ export default class F6251 extends F1040Attachment {
 
     // Use line 40 if Part III is required
     if (this.requiresPartIII()) {
-      return this.l40()
+      return this.part3().l40
     }
 
     const cap =
@@ -256,379 +287,247 @@ export default class F6251 extends F1040Attachment {
     return Math.max(0, (this.l9() ?? 0) - (this.l10() ?? 0))
   }
 
-  l12 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return this.l6()
-  }
-
-  l13 = (): number | undefined => {
+  part3 = (): Part3 => {
     if (!this.requiresPartIII()) {
-      return undefined
+      return {}
     }
-
-    const schDWksht = this.f1040.scheduleD?.rateGainWorksheet
-    if (schDWksht) {
-      const amount = schDWksht.l13()
-      if (amount != undefined) {
-        return amount
-      }
+    const fs = this.f1040.info.taxPayer.filingStatus
+    if (fs === undefined) {
+      throw new Error('Filing status is undefined')
     }
 
-    const filingStatus = this.f1040.info.taxPayer.filingStatus
-    if (filingStatus !== undefined) {
-      const wksht = new SDQualifiedAndCapGains(this.f1040)
-      return wksht.l4()
-    }
+    const qdivWorksheet = this.f1040.qualifiedAndCapGainsWorksheet
+    const schDWksht = this.f1040.scheduleD?.taxWorksheet
+    const usingTaxWorksheet = schDWksht !== undefined && schDWksht.isNeeded()
 
-    return undefined
-  }
+    const l18Consts: [number, number] = (() => {
+      if (this.f1040.info.taxPayer.filingStatus === FilingStatus.MFS) {
+        return [99950, 1999]
+      }
+      return [199900, 3998]
+    })()
 
-  l14 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
+    const l19Value: { [k in FilingStatus]: number } = {
+      [FilingStatus.MFJ]: 80800,
+      [FilingStatus.W]: 80800,
+      [FilingStatus.S]: 40400,
+      [FilingStatus.MFS]: 40400,
+      [FilingStatus.HOH]: 54100
     }
 
-    return this.f1040.scheduleD?.l14()
-  }
-
-  l15 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    if (!this.f1040.scheduleD?.rateGainWorksheet) {
-      return this.l13()
+    const l25Value: { [k in FilingStatus]: number } = {
+      [FilingStatus.MFJ]: 501600,
+      [FilingStatus.W]: 501600,
+      [FilingStatus.S]: 445860,
+      [FilingStatus.MFS]: 250800,
+      [FilingStatus.HOH]: 473750
     }
 
-    const l13And14 = (this.l13() ?? 0) + (this.l14() ?? 0)
-    return Math.min(
-      l13And14,
-      this.f1040.scheduleD?.rateGainWorksheet.l10() ?? 0
-    )
-  }
-
-  l16 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return Math.min(this.l12() ?? 0, this.l14() ?? 0)
-  }
+    const l12 = this.l6()
 
-  l17 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return (this.l12() ?? 0) - (this.l16() ?? 0)
-  }
+    // TODO - for F2555, see the instructions for amount
+    const l13: number = (() => {
+      if (usingTaxWorksheet) {
+        return schDWksht.l13() ?? 0
+      }
 
-  l18 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+      return qdivWorksheet?.l4() ?? 0
+    })()
 
-    const l17 = this.l17() ?? 0
-    const cap =
-      this.f1040.info.taxPayer.filingStatus === FilingStatus.MFS
-        ? 99950
-        : 199900
-    if (l17 <= cap) {
-      return l17 * 0.26
-    }
-    const subtract =
-      this.f1040.info.taxPayer.filingStatus === FilingStatus.MFS ? 1999 : 3998
-    return l17 * 0.28 - subtract
-  }
+    const l14 = this.f1040.scheduleD?.l19() ?? 0
 
-  l19 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l15 = (() => {
+      if (!usingTaxWorksheet) {
+        return l13
+      }
+      return Math.min(l13 + l14, schDWksht.l10() ?? 0)
+    })()
 
-    switch (this.f1040.info.taxPayer.filingStatus) {
-      case FilingStatus.MFS:
-      case FilingStatus.S:
-        return 40400
-      case FilingStatus.MFJ:
-      case FilingStatus.W:
-        return 80800
-      case FilingStatus.HOH:
-        return 54100
-    }
+    const l16 = Math.min(l12 ?? 0, l15 ?? 0)
 
-    return undefined
-  }
+    const l17 = (l12 ?? 0) - (l16 ?? 0)
 
-  l20 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l18 = (() => {
+      const [c1, c2] = l18Consts
 
-    const schDWksht = this.f1040.scheduleD?.rateGainWorksheet
-    if (schDWksht) {
-      const amount = schDWksht.l14()
-      if (amount !== undefined) {
-        return amount
+      if (l17 <= c1) {
+        return l17 * 0.26
       }
-    }
-
-    if (this.f1040.totalQualifiedDividends() > 0) {
-      const wksht = new SDQualifiedAndCapGains(this.f1040)
-      return wksht.l5()
-    }
-
-    return Math.max(0, this.f1040.l15() ?? 0)
-  }
-
-  l21 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+      return l17 * 0.28 - c2
+    })()
 
-    return Math.max(0, (this.l19() ?? 0) - (this.l20() ?? 0))
-  }
+    const l19 = l19Value[fs]
 
-  l22 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return Math.min(this.l12() ?? 0, this.l13() ?? 0)
-  }
+    const l20 = (() => {
+      if (usingTaxWorksheet) {
+        return schDWksht.l14() ?? 0
+      }
 
-  l23 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return Math.min(this.l21() ?? 0, this.l22() ?? 0)
-  }
+      if (qdivWorksheet !== undefined) {
+        return qdivWorksheet.l5()
+      }
 
-  l24 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+      return Math.max(0, this.f1040.l15())
+    })()
 
-    return Math.max(0, (this.l22() ?? 0) - (this.l23() ?? 0))
-  }
+    const l21 = Math.max(0, (l19 ?? 0) - (l20 ?? 0))
 
-  l25 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l22 = Math.min(l12 ?? 0, l13 ?? 0)
 
-    switch (this.f1040.info.taxPayer.filingStatus) {
-      case FilingStatus.S:
-        return 445850
-      case FilingStatus.MFS:
-        return 250800
-      case FilingStatus.MFJ:
-      case FilingStatus.W:
-        return 501600
-      case FilingStatus.HOH:
-        return 473750
-    }
+    const l23 = Math.min(l21 ?? 0, l22 ?? 0)
 
-    return undefined
-  }
+    const l24 = Math.max(0, (l22 ?? 0) - (l23 ?? 0))
 
-  l26 = (): number | undefined => this.l21()
+    const l25 = l25Value[fs]
 
-  l27 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l26 = l21
 
-    const schDWksht = this.f1040.scheduleD?.rateGainWorksheet
-    if (schDWksht) {
-      const amount = schDWksht.l21()
-      if (amount !== undefined) {
-        return amount
+    // TODO - see instructions for F2555
+    const l27 = (() => {
+      if (usingTaxWorksheet) {
+        return schDWksht.l21() ?? 0
       }
-    }
-
-    if (this.f1040.totalQualifiedDividends() > 0) {
-      const wksht = new SDQualifiedAndCapGains(this.f1040)
-      return wksht.l5()
-    }
 
-    return Math.max(0, this.f1040.l15() ?? 0)
-  }
-
-  l28 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return (this.l26() ?? 0) + (this.l27() ?? 0)
-  }
-
-  l29 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return Math.max(0, (this.l25() ?? 0) - (this.l28() ?? 0))
-  }
+      if (qdivWorksheet !== undefined) {
+        return qdivWorksheet.l5()
+      }
 
-  l30 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return Math.min(this.l24() ?? 0, this.l29() ?? 0)
-  }
+      return Math.max(0, this.f1040.l15())
+    })()
 
-  l31 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return (this.l30() ?? 0) * 0.15
-  }
+    const l28 = l26 + l27
 
-  l32 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return (this.l23() ?? 0) + (this.l30() ?? 0)
-  }
+    const l29 = Math.max(0, l25 - l28)
 
-  l33 = (): number | undefined => {
-    if (
-      !this.requiresPartIII() ||
-      (this.l12() ?? 0) - (this.l32() ?? 0) < 0.01
-    ) {
-      return undefined
-    }
-    return (this.l22() ?? 0) + (this.l32() ?? 0)
-  }
+    const l30 = Math.min(l24, l29)
 
-  l34 = (): number | undefined => {
-    const l33 = this.l33()
-    if (l33 === undefined) {
-      return undefined
-    }
-    return l33 * 0.2
-  }
+    const l31 = l30 * 0.15
 
-  l35 = (): number | undefined => {
-    if ((this.l14() ?? 0) === 0) {
-      return undefined
-    }
-    return (this.l17() ?? 0) + (this.l32() ?? 0) + (this.l33() ?? 0)
-  }
+    const l32 = l23 + l30
 
-  l36 = (): number | undefined => {
-    if ((this.l14() ?? 0) === 0) {
-      return undefined
-    }
-    return (this.l12() ?? 0) - (this.l35() ?? 0)
-  }
+    const l33 = l22 - l32
 
-  l37 = (): number | undefined => {
-    if ((this.l14() ?? 0) === 0) {
-      return undefined
-    }
-    return (this.l36() ?? 0) * 0.25
-  }
+    const l34 = l33 * 0.2
 
-  l38 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
-    return (
-      (this.l18() ?? 0) +
-      (this.l31() ?? 0) +
-      (this.l34() ?? 0) +
-      (this.l37() ?? 0)
-    )
-  }
+    const l35 = l17 + l32 + l33
 
-  l39 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l36 = l12 - l35
 
-    const l12 = this.l12() ?? 0
-    const cap =
-      this.f1040.info.taxPayer.filingStatus === FilingStatus.MFS
-        ? 99950
-        : 199900
-    if (l12 <= cap) {
-      return l12 * 0.26
-    }
-    const subtract =
-      this.f1040.info.taxPayer.filingStatus === FilingStatus.MFS ? 1999 : 3998
-    return l12 * 0.28 - subtract
-  }
+    const l37 = l36 * 0.25
 
-  l40 = (): number | undefined => {
-    if (!this.requiresPartIII()) {
-      return undefined
-    }
+    const l38 = l18 + l31 + l34 + l37
 
-    return Math.min(this.l38() ?? 0, this.l39() ?? 0)
+    const l39 = (() => {
+      // numbers referenced here are the same as l18.
+      const [c1, c2] = l18Consts
+      if (l12 <= c1) {
+        return l12 * 0.26
+      }
+      return l12 * 0.28 - c2
+    })()
+
+    const l40 = Math.min(l38, l39)
+
+    return {
+      l12,
+      l13,
+      l14,
+      l15,
+      l16,
+      l17,
+      l18,
+      l19,
+      l20,
+      l21,
+      l22,
+      l23,
+      l24,
+      l25,
+      l26,
+      l27,
+      l28,
+      l29,
+      l30,
+      l31,
+      l32,
+      l33,
+      l34,
+      l35,
+      l36,
+      l37,
+      l38,
+      l39,
+      l40
+    }
+  }
+
+  fields = (): Field[] => {
+    const p3 = this.part3()
+    return [
+      this.f1040.info.namesString(),
+      this.f1040.info.taxPayer.primaryPerson?.ssid,
+      // Part I
+      this.l1(),
+      this.l2a(),
+      this.l2b(),
+      this.l2c(),
+      this.l2d(),
+      this.l2e(),
+      this.l2f(),
+      this.l2g(),
+      this.l2h(),
+      this.l2i(),
+      this.l2j(),
+      this.l2k(),
+      this.l2l(),
+      this.l2m(),
+      this.l2n(),
+      this.l2o(),
+      this.l2p(),
+      this.l2q(),
+      this.l2r(),
+      this.l2s(),
+      this.l2t(),
+      this.l3(),
+      this.l4(),
+      // Part II
+      this.l5(),
+      this.l6(),
+      this.l7(),
+      this.l8(),
+      this.l9(),
+      this.l10(),
+      this.l11(),
+      // Part III
+      p3.l12,
+      p3.l13,
+      p3.l14,
+      p3.l15,
+      p3.l16,
+      p3.l17,
+      p3.l18,
+      p3.l19,
+      p3.l20,
+      p3.l21,
+      p3.l22,
+      p3.l23,
+      p3.l24,
+      p3.l25,
+      p3.l26,
+      p3.l27,
+      p3.l28,
+      p3.l29,
+      p3.l30,
+      p3.l31,
+      p3.l32,
+      p3.l33,
+      p3.l34,
+      p3.l35,
+      p3.l36,
+      p3.l37,
+      p3.l38,
+      p3.l39,
+      p3.l40
+    ]
   }
-
-  fields = (): Field[] => [
-    this.f1040.info.namesString(),
-    this.f1040.info.taxPayer.primaryPerson?.ssid,
-    // Part I
-    this.l1(),
-    this.l2a(),
-    this.l2b(),
-    this.l2c(),
-    this.l2d(),
-    this.l2e(),
-    this.l2f(),
-    this.l2g(),
-    this.l2h(),
-    this.l2i(),
-    this.l2j(),
-    this.l2k(),
-    this.l2l(),
-    this.l2m(),
-    this.l2n(),
-    this.l2o(),
-    this.l2p(),
-    this.l2q(),
-    this.l2r(),
-    this.l2s(),
-    this.l2t(),
-    this.l3(),
-    this.l4(),
-    // Part II
-    this.l5(),
-    this.l6(),
-    this.l7(),
-    this.l8(),
-    this.l9(),
-    this.l10(),
-    this.l11(),
-    // Part III
-    this.l12(),
-    this.l13(),
-    this.l14(),
-    this.l15(),
-    this.l16(),
-    this.l17(),
-    this.l18(),
-    this.l19(),
-    this.l20(),
-    this.l21(),
-    this.l22(),
-    this.l23(),
-    this.l24(),
-    this.l25(),
-    this.l26(),
-    this.l27(),
-    this.l28(),
-    this.l29(),
-    this.l30(),
-    this.l31(),
-    this.l32(),
-    this.l33(),
-    this.l34(),
-    this.l35(),
-    this.l36(),
-    this.l37(),
-    this.l38(),
-    this.l39(),
-    this.l40()
-  ]
 }
diff --git a/src/forms/Y2021/irsForms/ScheduleD.ts b/src/forms/Y2021/irsForms/ScheduleD.ts
index f4138492a..0325cf67c 100644
--- a/src/forms/Y2021/irsForms/ScheduleD.ts
+++ b/src/forms/Y2021/irsForms/ScheduleD.ts
@@ -7,11 +7,14 @@ import F8949 from './F8949'
 import F1040Attachment from './F1040Attachment'
 import F1040 from './F1040'
 import { Field } from 'ustaxes/core/pdfFiller'
-
+import SDTaxWorksheet from './worksheets/SDTaxWorksheet'
+import QualDivAndCGWorksheet from './worksheets/SDQualifiedAndCapGains'
 export default class ScheduleD extends F1040Attachment {
   tag: FormTag = 'f1040sd'
   sequenceIndex = 12
   aggregated: F1099BData
+  qualifiedDivAndCGWorksheet: QualDivAndCGWorksheet
+  taxWorksheet: SDTaxWorksheet
   rateGainWorksheet: SDRateGainWorksheet
   unrecaptured1250: SDUnrecaptured1250
 
@@ -31,6 +34,8 @@ export default class ScheduleD extends F1040Attachment {
     }
 
     this.rateGainWorksheet = new SDRateGainWorksheet()
+    this.taxWorksheet = new SDTaxWorksheet(f1040)
+    this.qualifiedDivAndCGWorksheet = new QualDivAndCGWorksheet(f1040)
     this.unrecaptured1250 = new SDUnrecaptured1250()
   }
 
diff --git a/src/forms/Y2021/irsForms/worksheets/SDQualifiedAndCapGains.ts b/src/forms/Y2021/irsForms/worksheets/SDQualifiedAndCapGains.ts
index 4328754c0..9dfc1f90c 100644
--- a/src/forms/Y2021/irsForms/worksheets/SDQualifiedAndCapGains.ts
+++ b/src/forms/Y2021/irsForms/worksheets/SDQualifiedAndCapGains.ts
@@ -3,18 +3,7 @@ import { WorksheetData } from 'ustaxes/components/SummaryData'
 import { FilingStatus } from 'ustaxes/core/data'
 import federalBrackets from '../../data/federal'
 import { computeOrdinaryTax } from '../../irsForms/TaxTable'
-import F1040 from '../F1040'
-
-export interface TestData {
-  qualDiv: number
-  taxableIncome: number
-  f1040l7: number | undefined
-  sdl15: number | undefined
-  sdl16: number | undefined
-  sdl18: number | undefined
-  sdl19: number | undefined
-  filingStatus: FilingStatus
-}
+import { Worksheet } from '../F1040Attachment'
 
 type Bracket = [number, number]
 type Cutoffs = { [key in FilingStatus]: Bracket }
@@ -26,40 +15,39 @@ const cutoffAmounts: Cutoffs = {
   [FilingStatus.HOH]: [54100, 473750]
 }
 
-export default class QualDivAndCGWorksheetReference {
-  [k: string]: TestData | (() => number) | (() => WorksheetData)
-  data: TestData
-
-  constructor(f1040: F1040) {
-    const filingStatus = f1040.info.taxPayer.filingStatus
-    if (filingStatus === undefined) {
+export default class QualDivAndCGWorksheet extends Worksheet {
+  fs = (): FilingStatus => {
+    const fs = this.f1040.info.taxPayer.filingStatus
+    if (fs === undefined) {
       throw new Error('Filing status is undefined')
     }
-    this.data = {
-      qualDiv: f1040.l3a() ?? 0,
-      taxableIncome: f1040.l15(),
-      f1040l7: f1040.l7(),
-      sdl15: f1040.scheduleD?.l15(),
-      sdl16: f1040.scheduleD?.l16(),
-      sdl18: f1040.scheduleD?.l18(),
-      sdl19: f1040.scheduleD?.l19(),
-      filingStatus
-    }
+    return fs
   }
 
-  // 1. Enter the amount from Form 1040 or 1040-SR, line 15. However, if you are filing Form 2555 (relating to foreign earned income), enter the amount from line 3 of the Foreign Earned Income Tax Worksheet
-  l1 = (): number => this.data.taxableIncome
+  // 1. Enter the amount from Form 1040 or 1040-SR, line 15.
+  // However, if you are filing Form 2555(relating to foreign earned income),
+  // enter the amount from line 3 of the Foreign Earned Income Tax Worksheet
+  l1 = (): number => {
+    if (this.f1040.f2555 !== undefined) {
+      return this.f1040.f2555.l3() ?? 0
+    }
+    return this.f1040.l15()
+  }
   // 2. Enter the amount from Form 1040 or 1040-SR, line 3a*
-  l2 = (): number => this.data.qualDiv
+  l2 = (): number => this.f1040.l3a() ?? 0
   // 3. Are you filing Schedule D?*
-  // Yes. Enter the smaller of line 15 or 16 of Schedule D. If either line 15 or 16 is blank or a loss, enter -0-. 3.
+  // Yes. Enter the smaller of line 15 or 16 of Schedule D.
+  //      If either line 15 or 16 is blank or a loss, enter - 0 -. 3.
   // No. Enter the amount from Form 1040 or 1040-SR, line 7.
-  // Either way, it's the smaller of LTCG or total capital gain.
-  l3 = (): number =>
-    Math.min(
-      Math.max(this.data.sdl15 ?? 0, 0),
-      Math.max(this.data.sdl16 ?? 0, 0)
-    )
+  l3 = (): number => {
+    if (this.f1040.scheduleD !== undefined) {
+      return Math.min(
+        Math.max(this.f1040.scheduleD?.l15() ?? 0, 0),
+        Math.max(this.f1040.scheduleD?.l16() ?? 0, 0)
+      )
+    }
+    return this.f1040.l7() ?? 0
+  }
   // 4. Add lines 2 and 3: LTCG + QDIV
   l4 = (): number => this.l2() + this.l3()
   // 5. Subtract line 4 from line 1. If zero or less, enter -0-
@@ -67,7 +55,7 @@ export default class QualDivAndCGWorksheetReference {
   // 6. Enter:
   // $40,400 if single or married filing separately,
   // $80,800 if married filing jointly or qualifying widow(er), $54,100 if head of household.
-  l6 = (): number => cutoffAmounts[this.data.filingStatus][0]
+  l6 = (): number => cutoffAmounts[this.fs()][0]
   // 7. Enter the smaller of line 1 or line 6
   l7 = (): number => Math.min(this.l1(), this.l6())
   // 8. Enter the smaller of line 5 or line 7
@@ -83,7 +71,7 @@ export default class QualDivAndCGWorksheetReference {
   // 13. Enter:
   // $445,850 if single, $250,800 if married filing separately, $501,600 if married filing jointly or qualifying widow(er), $473,750 if head of household.
   //
-  l13 = (): number => cutoffAmounts[this.data.filingStatus][1]
+  l13 = (): number => cutoffAmounts[this.fs()][1]
   // 14. Enter the smaller of line 1 or line 13
   l14 = (): number => Math.min(this.l1(), this.l13())
   // 15. Add lines 5 and 9
@@ -103,11 +91,11 @@ export default class QualDivAndCGWorksheetReference {
   l21 = (): number =>
     (this.l20() * federalBrackets.longTermCapGains.rates[2]) / 100
   // 22. Figure the tax on the amount on line 5. If the amount on line 5 is less than $100,000, use the Tax Table to figure the tax. If the amount on line 5 is $100,000 or more, use the Tax Computation Worksheet
-  l22 = (): number => computeOrdinaryTax(this.data.filingStatus, this.l5())
+  l22 = (): number => computeOrdinaryTax(this.fs(), this.l5())
   // 23. Add lines 18, 21, and 22
   l23 = (): number => this.l18() + this.l21() + this.l22()
   // 24. Figure the tax on the amount on line 1. If the amount on line 1 is less than $100,000, use the Tax Table to figure the tax. If the amount on line 1 is $100,000 or more, use the Tax Computation Worksheet
-  l24 = (): number => computeOrdinaryTax(this.data.filingStatus, this.l1())
+  l24 = (): number => computeOrdinaryTax(this.fs(), this.l1())
   // 25. Tax on all taxable income. Enter the smaller of line 23 or 24. Also include this amount on the entry space on Form 1040 or 1040-SR, line 16. If you are filing Form 2555, don’t enter this amount on the entry space on Form 1040 or 1040-SR, line 16. Instead, enter it on line 4 of the Foreign Earned Income Tax Worksheet
   l25 = (): number => Math.min(this.l23(), this.l24())
 
diff --git a/src/forms/Y2021/irsForms/worksheets/SDTaxWorksheet.ts b/src/forms/Y2021/irsForms/worksheets/SDTaxWorksheet.ts
new file mode 100644
index 000000000..73450c6af
--- /dev/null
+++ b/src/forms/Y2021/irsForms/worksheets/SDTaxWorksheet.ts
@@ -0,0 +1,40 @@
+import { Worksheet } from '../F1040Attachment'
+
+export default class SDTaxWorksheet extends Worksheet {
+  /**
+   * Complete this worksheet only if line 18 or line 19 of Schedule D is more than zero
+   * and lines 15 and 16 of Schedule D are gains or if you file Form 4952 and you have
+   * an amount on line 4g, even if you don’t need to file Schedule D. Otherwise,
+   * complete the Qualified Dividends and Capital Gain Tax Worksheet in the instructions
+   * for Forms 1040 and 1040-SR, line 16 (or in the instructions for Form 1040-NR, line 16)
+   * to figure your tax. Before completing this worksheet, complete Form 1040, 1040-SR, or
+   * 1040-NR through line 15.
+   */
+  isNeeded = (): boolean => {
+    const sd = this.f1040.scheduleD
+    const f4952 = this.f1040.f4952
+
+    const sdCondition =
+      sd !== undefined &&
+      ((sd.l18() ?? 0) > 0 || (sd?.l19() ?? 0) > 0) &&
+      sd.l15() > 0 &&
+      sd.l16() > 0
+
+    const f4952Condition = f4952 !== undefined && (f4952.l4g() ?? 0) > 0
+
+    return sdCondition || f4952Condition
+  }
+
+  // TODO - Required by 6251,
+  // Might be refigured for AMT
+  l10 = (): number | undefined => undefined
+
+  // TODO - Required by 6251,
+  l13 = (): number | undefined => undefined
+
+  // TODO - Required by 6251,
+  l14 = (): number | undefined => undefined
+
+  // TODO - Required by 6251,
+  l21 = (): number | undefined => undefined
+}