src/fed2019/Form1116.ts

   1 import Form from '../Form';
   2 import TaxReturn from '../TaxReturn';
   3 import Person from '../Person';
   4 import { ComputedLine, InputLine, ReferenceLine } from '../Line';
   5 import { UnsupportedFeatureError } from '../Errors';
   6 import { reduceBySum } from '../Math';
   7
   8 import Form1040, { Schedule2 } from './Form1040';
   9 import Form8949 from './Form8949';
  10 import ScheduleD from './ScheduleD';
  11
  12 export enum ForeignIncomeCategory {
  13   A = 'A: Section 951A category',
  14   B = 'B: Foreign branch category',
  15   C = 'C: Passive category',
  16   D = 'D: General category',
  17   E = 'E: Section 901(j)',
  18   F = 'F: Certain income re-sourced by treaty',
  19   G = 'G: Lump-sum distributions',
  20 };
  21
  22 export interface Form1116Input {
  23   person: Person;
  24   incomeCategory: ForeignIncomeCategory;
  25   posessionName: 'RIC' | string;
  26   grossForeignIncome: number;
  27   lossesFromForeignSources?: number;
  28   totalForeignTaxesPaidOrAccrued: number;
  29 };
  30
  31 class Input<T extends keyof Form1116Input> extends InputLine<Form1116Input, T> {};
  32
  33 export default class Form1116 extends Form<Form1116['_lines'], Form1116Input> {
  34   readonly name = '1116';
  35
  36   protected readonly _lines = {
  37     'category': new ComputedLine((tr: TaxReturn): ForeignIncomeCategory => {
  38       const input = this.getInput('incomeCategory');
  39       if (input != ForeignIncomeCategory.C)
  40         throw new UnsupportedFeatureError(`Form 1116 does not support ${input}`);
  41       return input;
  42     }),
  43     'i': new Input('posessionName'),
  44     '1a': new Input('grossForeignIncome'),
  45     // 1b not supported - services as an employee.
  46     // 2 not supported - Expenses definitely related to the income
  47     '3a': new ReferenceLine(Form1040, '9', 'Deductions'),
  48     '3b': new ComputedLine(() => 0, 'Other deductions'),  // Not supported
  49     '3c': new ComputedLine((tr): number => {
  50       return this.getValue(tr, '3a') + this.getValue(tr, '3b');
  51     }),
  52     '3d': new ReferenceLine(Form1116 as any, '1a'),  // Should exclude income from unsupported Form 2555.
  53     '3e': new ComputedLine((tr): number => {
  54       const f1040 = tr.findForm(Form1040);
  55       // Take total income, but do not net capital gains out with losses, so remove
  56       // line 6.
  57       let grossIncome = f1040.getValue(tr, '7b') - f1040.getValue(tr, '6');
  58       const f8949 = tr.findForm(Form8949);
  59       if (f8949) {
  60         const keys: (keyof Form8949['lines'])[] = ['boxA', 'boxB', 'boxC', 'boxD', 'boxE', 'boxF'];
  61         const values = keys.map(k => f8949.getValue(tr, k).gainOrLoss).filter(n => n > 0);
  62         grossIncome += reduceBySum(values);
  63
  64         grossIncome += tr.getForm(ScheduleD).getValue(tr, '13');
  65       }
  66       return grossIncome;
  67     }),
  68     '3f': new ComputedLine((tr): number => {
  69       return Number.parseFloat((this.getValue(tr, '3d') / this.getValue(tr, '3e')).toFixed(4));
  70     }),
  71     '3g': new ComputedLine((tr): number => {
  72       return this.getValue(tr, '3c') * this.getValue(tr, '3f');
  73     }),
  74     // 4 not supported - Pro rata share of interest expense
  75     '5': new Input('lossesFromForeignSources', undefined, 0),
  76     '6': new ComputedLine((tr): number => {
  77       // Should include 2, 4a, 4b.
  78       return this.getValue(tr, '3g') + this.getValue(tr, '5');
  79     }),
  80     '7': new ComputedLine((tr): number => this.getValue(tr, '1a') - this.getValue(tr, '6')),
  81     // Skip the complicated Part II matrix and just use the input value.
  82     '8': new Input('totalForeignTaxesPaidOrAccrued'),
  83     '9': new ReferenceLine(Form1116 as any, '8'),
  84     // 10 not supported - Carryback or carryover
  85     '11': new ComputedLine((tr): number => this.getValue(tr, '9') /* + this.getValue(tr, '10') */),
  86     // 12 not supported - Reduction in foreign taxes
  87     // 13 not supported - Taxes reclassified under high tax kickout
  88     '14': new ComputedLine((tr): number => {
  89       return this.getValue(tr, '11') /*+
  90              this.getValue(tr, '12') +
  91              this.getValue(tr, '13')*/;
  92     }),
  93     '15': new ReferenceLine(Form1116 as any, '7'),
  94     // 16 not supported - Adjustments to line 15
  95     '17': new ComputedLine((tr): number => this.getValue(tr, '15') /* + this.getValue(tr, '16') */),
  96     // TODO - This does not handle necessary adjustments.
  97     '18': new ReferenceLine(Form1040, '11b'),
  98     '19': new ComputedLine((tr): number => this.getValue(tr, '17') / this.getValue(tr, '18')),
  99     '20': new ComputedLine((tr): number => {
 100       let value = tr.getForm(Form1040).getValue(tr, '12a');
 101       const sched2 = tr.findForm(Schedule2);
 102       if (sched2)
 103         value += sched2.getValue(tr, '2');
 104       return value;
 105     }),
 106     '21': new ComputedLine((tr): number => this.getValue(tr, '20') * this.getValue(tr, '19'), 'Maximum amount of credit'),
 107     '22': new ComputedLine((tr): number => Math.min(this.getValue(tr, '14'), this.getValue(tr, '21'))),
 108     // 23-30 not supported (other category F1116)
 109     '31': new ReferenceLine(Form1116 as any, '22'),
 110     // 32 not supported - Reduction of credit for international boycott operations
 111     '33': new ComputedLine((tr): number => this.getValue(tr, '31') /* - this.getValue(tr, '32')*/),
 112   };
 113 };