src/fed2019/Form1040.ts

   1 import Form, { FormClass } from '../Form';
   2 import TaxReturn from '../TaxReturn';
   3 import { Line, AccumulatorLine, ComputedLine, ReferenceLine, sumLineOfForms } from '../Line';
   4 import { UnsupportedFeatureError } from '../Errors';
   5 import { reduceBySum } from '../Math';
   6
   7 import Form8606 from './Form8606';
   8 import Form8959 from './Form8959';
   9 import Form1099INT from './Form1099INT';
  10 import Form1099DIV from './Form1099DIV';
  11 import Form1099R, { Box7Code } from './Form1099R';
  12 import FormW2 from './FormW2';
  13 import Schedule2 from './Schedule2';
  14 import ScheduleD, { ScheduleDTaxWorksheet } from './ScheduleD';
  15
  16 export enum FilingStatus {
  17   Single = 'S',
  18   MarriedFilingSeparate = 'MFS',
  19   MarriedFilingJoint = 'MFJ',
  20 };
  21
  22 export interface Form1040Input {
  23   filingStatus: FilingStatus;
  24 };
  25
  26 export default class Form1040 extends Form<Form1040['_lines'], Form1040Input> {
  27   readonly name = '1040';
  28
  29   protected readonly _lines = {
  30     '1': new AccumulatorLine(FormW2, '1', 'Wages, salaries, tips, etc.'),
  31     '2a': new AccumulatorLine(Form1099INT, '8', 'Tax-exempt interest'),
  32     '2b': new AccumulatorLine(Form1099INT, '1', 'Taxable interest'),
  33     '3a': new AccumulatorLine(Form1099DIV, '1b', 'Qualified dividends'),
  34     '3b': new AccumulatorLine(Form1099DIV, '1a', 'Ordinary dividends'),
  35     '4a': new ComputedLine((tr): number => {
  36       const f1099Rs = tr.findForms(Form1099R).filter(f => !f.getValue(tr, '7').includes(Box7Code.G));
  37       return sumLineOfForms(tr, f1099Rs, '1');
  38     }),
  39     '4b': new ComputedLine((tr): number => {
  40       const f8606s = tr.findForms(Form8606);
  41       return sumLineOfForms(tr, f8606s, '15c') + sumLineOfForms(tr, f8606s, '18');
  42     }, 'IRA distributions, taxadble amount'),
  43     '4d': new ComputedLine(() => 0),
  44     // 4c and 4d are not supported
  45     // 5a and 5b are not supported
  46     '6': new ComputedLine((tr): number => {
  47       const schedD = tr.findForm(ScheduleD);
  48       if (!schedD)
  49         return 0;
  50
  51       const l6 = schedD.getValue(tr, '16');
  52       if (l6 > 0)
  53         return l6;
  54       return schedD.getValue(tr, '21');
  55     }, 'Capital gain/loss'),
  56     '7a': new ReferenceLine(/*'Schedule 1'*/ undefined, '9', 'Other income from Schedule 1', 0),
  57
  58     '7b': new ComputedLine((tr): number => {
  59       let income = 0;
  60       income += this.getValue(tr, '1');
  61       income += this.getValue(tr, '2b');
  62       income += this.getValue(tr, '3b');
  63       income += this.getValue(tr, '4b');
  64       income += this.getValue(tr, '4d');
  65       //income += this.getValue(tr, '5b');
  66       income += this.getValue(tr, '6');
  67       income += this.getValue(tr, '7a');
  68       return income;
  69     }, 'Total income'),
  70
  71     '8a': new ReferenceLine(undefined /*'Schedule 1'*/, '22', 'Adjustments to income', 0),
  72
  73     '8b': new ComputedLine((tr): number => {
  74       return this.getValue(tr, '7b') - this.getValue(tr, '8a');
  75     }, 'Adjusted gross income'),
  76
  77     '9': new ComputedLine((): number => {
  78       // TODO - Itemized deductions.
  79       switch (this.getInput('filingStatus')) {
  80         case FilingStatus.Single:
  81         case FilingStatus.MarriedFilingSeparate:
  82           return 12200;
  83         case FilingStatus.MarriedFilingJoint:
  84           return 24400;
  85       }
  86     }, 'Deduction'),
  87
  88     '10': new ComputedLine((tr): number => {
  89       const taxableIncome = this.getValue(tr, '8b');
  90       let use8995a = false;
  91       switch (this.getInput('filingStatus')) {
  92         case FilingStatus.Single:                use8995a = taxableIncome <= 160700; break;
  93         case FilingStatus.MarriedFilingSeparate: use8995a = taxableIncome <= 160725; break;
  94         case FilingStatus.MarriedFilingJoint:    use8995a = taxableIncome <= 321400; break;
  95       };
  96       return 0;
  97     }, 'Qualified business income deduction'),
  98
  99     '11a': new ComputedLine((tr): number => {
 100       return this.getValue(tr, '9') + this.getValue(tr, '10');
 101     }),
 102     '11b': new ComputedLine((tr): number => {
 103       const value = this.getValue(tr, '8b') - this.getValue(tr, '11a');
 104       return value < 0 ? 0 : value;
 105     }, 'Taxable income'),
 106
 107     '12a': new ComputedLine((tr): number => {
 108       // Not supported:
 109       // Form 8814 (election to report child's interest or dividends)
 110       // Form 4972 (relating to lump-sum distributions)
 111       const taxableIncome = this.getValue(tr, '11b');
 112
 113       if (this.getValue(tr, '3a') > 0 && !tr.findForm(ScheduleD))
 114         throw new UnsupportedFeatureError('Qualified Dividends and Captial Gains Tax Worksheet not supported, Schedule D requried');
 115
 116       const schedD = tr.findForm(ScheduleDTaxWorksheet);
 117       if (schedD)
 118         return schedD.getValue(tr, '47');
 119
 120       return computeTax(taxableIncome, this.getInput('filingStatus'));
 121     }, 'Tax'),
 122
 123     '12b': new ComputedLine((tr): number => {
 124       return this.getValue(tr, '12a') + tr.getForm(Schedule2).getValue(tr, '3');
 125     }, 'Additional tax'),
 126
 127     // Not supported: 13a - child tax credit
 128
 129     '13b': new ComputedLine((tr): number => {
 130       // TODO: add Sched 3.L7
 131       return 0;
 132     }, 'Additional credits'),
 133
 134     '14': new ComputedLine((tr): number => {
 135       const l12b = this.getValue(tr, '12b');
 136       const l13b = this.getValue(tr, '13b');
 137       const value = l12b - l13b;
 138       return value < 0 ? 0 : value;
 139     }),
 140
 141     '15': new ReferenceLine(Schedule2, '10', undefined, 0),
 142
 143     '16': new ComputedLine((tr): number => {
 144       return this.getValue(tr, '14') + this.getValue(tr, '15');
 145     }, 'Total tax'),
 146
 147     '17': new ComputedLine((tr): number => {
 148       const fedTaxWithheldBoxes = [
 149         new AccumulatorLine(FormW2, '2'),
 150         new AccumulatorLine(Form1099R, '4'),
 151         new AccumulatorLine(Form1099DIV, '4'),
 152         new AccumulatorLine(Form1099INT, '4'),
 153       ];
 154       const withholding: number[] = fedTaxWithheldBoxes.map(b => b.value(tr));
 155
 156       let additionalMedicare = 0;
 157       const f8959 = tr.findForm(Form8959)
 158       if (f8959) {
 159         additionalMedicare = f8959.getValue(tr, '24');
 160       }
 161
 162       return reduceBySum(withholding) + additionalMedicare;
 163     }, 'Federal income tax withheld'),
 164
 165     // 18 not supported
 166
 167     '19': new ReferenceLine(Form1040 as any, '17', 'Total payments'),
 168
 169     '20': new ComputedLine((tr): number => {
 170       const l16: number = this.getValue(tr, '16');
 171       const l19: number = this.getValue(tr, '19');
 172       if (l19 > l16)
 173         return l19 - l16;
 174       return 0;
 175     }, 'Amount overpaid'),
 176
 177     '23': new ComputedLine((tr): number => {
 178       const l16 = this.getValue(tr, '16');
 179       const l19 = this.getValue(tr, '19');
 180       if (l19 < l16)
 181         return l16 - l19;
 182       return 0;
 183     }, 'Amount you owe'),
 184   };
 185 };
 186
 187 export function computeTax(income: number, filingStatus: FilingStatus): number {
 188   if (income < 100000)
 189     throw new UnsupportedFeatureError('Tax-table tax liability not supported');
 190
 191   switch (filingStatus) {
 192     case FilingStatus.Single:
 193       if (income < 160725)
 194         return (income * 0.24) - 5825.50;
 195       else if (income < 204100)
 196         return (income * 0.32) - 18683.50;
 197       else if (income < 510300)
 198         return (income * 0.35) - 24806.50;
 199       else
 200         return (income * 0.38) - 35012.50;
 201     case FilingStatus.MarriedFilingJoint:
 202       if (income < 168400)
 203         return (income * 0.22) - 8283.00;
 204       else if (income < 321450)
 205         return (income * 0.24) - 11651.00;
 206       else if (income < 408200)
 207         return (income * 0.32) - 37367.00;
 208       else if (income < 612350)
 209         return (income * 0.35) - 49613.00;
 210       else
 211         return (income * 0.37) - 61860.00;
 212     case FilingStatus.MarriedFilingSeparate:
 213       if (income < 160725)
 214         return (income * 0.24) - 5825.50;
 215       else if (income < 204100)
 216         return (income * 0.32) - 18683.50;
 217       else if (income < 306175)
 218         return (income * 0.35) - 24806.50;
 219       else
 220         return (income * 0.37) - 30930.00;
 221   }
 222   throw new UnsupportedFeatureError('Unexpected return type');
 223 };