src/fed2019/Form6251.ts

   1 // Copyright 2020 Blue Static <https://www.bluestatic.org>
   2 // This program is free software licensed under the GNU General Public License,
   3 // version 3.0. The full text of the license can be found in LICENSE.txt.
   4 // SPDX-License-Identifier: GPL-3.0-only
   5
   6 import { Form, TaxReturn } from '../core';
   7 import { AccumulatorLine, ComputedLine, ReferenceLine, UnsupportedLine, sumFormLines } from '../core/Line';
   8 import { Literal, clampToZero } from '../core/Math';
   9
  10 import Form1040, { QDCGTaxWorksheet, FilingStatus } from './Form1040';
  11 import Form1099INT from './Form1099INT';
  12 import Schedule1 from './Schedule1';
  13 import Schedule2 from './Schedule2';
  14 import Schedule3 from './Schedule3';
  15 import ScheduleD, { ScheduleDTaxWorksheet } from './ScheduleD';
  16
  17 export default class Form6251 extends Form {
  18   readonly name = '6251';
  19
  20   readonly lines = {
  21     // Part I
  22     '1': new ComputedLine((tr): number => {
  23       const f1040 = tr.getForm(Form1040);
  24       const income = f1040.taxableIncome(tr);
  25       if (income > 0)
  26         return income;
  27       return f1040.adjustedGrossIncome(tr) - f1040.deduction(tr) - f1040.qualifiedBusinessIncomeDeduction(tr);
  28     }),
  29     '2a': new ComputedLine((tr): number => {
  30       // Not supported: Schedule A, line 7.
  31       return tr.getForm(Form1040).deduction(tr);
  32     }),
  33     '2b': new ReferenceLine(Schedule1, '1', 'Tax refund', 0),  // Not supported - line 8 SALT.
  34     '2c': new UnsupportedLine('Investment interest expense'),
  35     '2d': new UnsupportedLine('Depletion'),
  36     '2e': new UnsupportedLine('Net operating loss deduction'),
  37     '2f': new UnsupportedLine('Alternative tax net operating loss deduction'),
  38     '2g': new AccumulatorLine(Form1099INT, '9', 'Interest from specified private activity bonds exempt from the regular tax'),
  39     '2h': new UnsupportedLine('Qualified small business stock'),
  40     '2i': new UnsupportedLine('Exercise of incentive stock options'),
  41     '2j': new UnsupportedLine('Estates and trusts (amount from Schedule K-1 (Form 1041), box 12, code A)'),
  42     '2k': new UnsupportedLine('Disposition of property'),
  43     '2l': new UnsupportedLine('Depreciation on assets placed in service after 1986'),
  44     '2m': new UnsupportedLine('Passive activities'),
  45     '2n': new UnsupportedLine('Loss limitations'),
  46     '2o': new UnsupportedLine('Circulation costs'),
  47     '2p': new UnsupportedLine('Long-term contracts'),
  48     '2q': new UnsupportedLine('Mining costs'),
  49     '2r': new UnsupportedLine('Research and experimental costs'),
  50     '2s': new UnsupportedLine('Income from certain installment sales before January 1, 1987'),
  51     '2t': new UnsupportedLine('Intangible drilling costs preference'),
  52     '3': new UnsupportedLine('Other adjustments'),
  53     '4': new ComputedLine((tr): number => {
  54       return sumFormLines(tr, this, ['1', '2a', '2b', '2c', '2d', '2e', '2f', '2g', '2h', '2i', '2j', '2k', '2l', '2m', '2n', '2o', '2p', '2q', '2r', '2s', '2t', '3']);
  55     }, 'Alternative minimum taxable income'),
  56
  57     // Part II
  58     '5': new ComputedLine((tr): number => {
  59       const fs = tr.getForm(Form1040).filingStatus;
  60       const exemption = tr.constants.amt.exemption[fs];
  61       const phaseout = tr.constants.amt.phaseout[fs];
  62
  63       const l4 = this.getValue(tr, '4');
  64       if (l4 < phaseout)
  65         return exemption;
  66
  67       // Exemption worksheet:
  68       const wl1 = exemption;
  69       const wl2 = l4;
  70       const wl3 = phaseout;
  71       const wl4 = clampToZero(wl2 - wl3);
  72       const wl5 = wl4 * Literal(0.25);
  73       const wl6 = clampToZero(wl1 - wl5);
  74       return wl6;
  75     }),
  76     '6': new ComputedLine((tr): number => {
  77       return clampToZero(this.getValue(tr, '4') - this.getValue(tr, '5'));
  78     }),
  79     '7': new ComputedLine((tr): number => {
  80       // Not supported - Form 2555.
  81       // Not supported - Form1040 directly reporting cap gains on line 6.
  82
  83       const f1040 = tr.getForm(Form1040);
  84
  85       let part3 = f1040.qualifiedDividends(tr) > 0;
  86
  87       const schedD = tr.findForm(ScheduleD);
  88       if (schedD) {
  89         const flag = schedD.getValue(tr, '15') > 0 && schedD.getValue(tr, '16') > 0;
  90         part3 = part3 || flag;
  91       }
  92
  93       if (part3)
  94         return this.getValue(tr, '40');
  95
  96       return computeAmtTax(tr, this.getValue(tr, '6'));
  97     }),
  98     '8': new ReferenceLine(Schedule3, '1', 'Alternative minimum tax foreign tax credit'),  // Not supported - AMT FTC recalculation
  99     '9': new ComputedLine((tr): number => {
 100       return this.getValue(tr, '7') - this.getValue(tr, '8');
 101     }, 'Tentative minimum tax'),
 102     '10': new ComputedLine((tr): number => {
 103       let value = tr.getForm(Form1040).tax(tr);
 104       const sched2 = tr.findForm(Schedule2);
 105       if (sched2) {
 106         value += sched2.getValue(tr, '2');
 107       }
 108       // Not supported - subtracting Schedule3@1 for the AMT FTC.
 109       return value;
 110     }),
 111     '11': new ComputedLine((tr): number => {
 112       return clampToZero(this.getValue(tr, '9') - this.getValue(tr, '10'));
 113     }, 'AMT'),
 114
 115     // Part III
 116     '12': new ReferenceLine(Form6251 as any, '6'),
 117     '13': new ComputedLine((tr): number => {
 118       const schedDTW = tr.findForm(ScheduleDTaxWorksheet);
 119       if (schedDTW)
 120         return schedDTW.getValue(tr, '13');
 121
 122       return tr.getForm(QDCGTaxWorksheet).dividendsAndCapitalGains(tr);
 123     }),
 124     '14': new ReferenceLine(ScheduleD, '19', undefined, 0),
 125     '15': new ComputedLine((tr): number => {
 126       const value = this.getValue(tr, '13') + this.getValue(tr, '14');
 127       const schedDTW = tr.findForm(ScheduleDTaxWorksheet);
 128       if (schedDTW)
 129         return Math.min(value, schedDTW.getValue(tr, '10'));
 130
 131       return value;
 132     }),
 133     '16': new ComputedLine((tr): number => Math.min(this.getValue(tr, '12'), this.getValue(tr, '15'))),
 134     '17': new ComputedLine((tr): number => this.getValue(tr, '12') - this.getValue(tr, '16')),
 135     '18': new ComputedLine((tr): number => computeAmtTax(tr, this.getValue(tr, '17'))),
 136     '19': new ComputedLine((tr): number => {
 137       const fs = tr.getForm(Form1040).filingStatus;
 138       return tr.constants.capitalGains.rate0MaxIncome[fs];
 139     }),
 140     '20': new ComputedLine((tr): number => {
 141       const schedDTW = tr.findForm(ScheduleDTaxWorksheet);
 142       if (schedDTW)
 143         return clampToZero(schedDTW.getValue(tr, '14'));
 144
 145       return clampToZero(tr.getForm(QDCGTaxWorksheet).taxableIncomeLessDividendsAndCapitalGains(tr));
 146     }),
 147     '21': new ComputedLine((tr): number => clampToZero(this.getValue(tr, '19') - this.getValue(tr, '20'))),
 148     '22': new ComputedLine((tr): number => Math.min(this.getValue(tr, '12'), this.getValue(tr, '13'))),
 149     '23': new ComputedLine((tr): number => Math.min(this.getValue(tr, '21'), this.getValue(tr, '22'))),
 150     '24': new ComputedLine((tr): number => this.getValue(tr, '22') - this.getValue(tr, '23')),
 151     '25': new ComputedLine((tr): number => {
 152       const fs = tr.getForm(Form1040).filingStatus;
 153       return tr.constants.capitalGains.rate15MaxIncome[fs];
 154     }),
 155     '26': new ReferenceLine(Form6251 as any, '21'),
 156     '27': new ComputedLine((tr): number => {
 157       const schedDTW = tr.findForm(ScheduleDTaxWorksheet);
 158       if (schedDTW)
 159         return clampToZero(schedDTW.getValue(tr, '21'));
 160
 161       return clampToZero(tr.getForm(QDCGTaxWorksheet).taxableIncomeLessDividendsAndCapitalGains(tr));
 162     }),
 163     '28': new ComputedLine((tr): number => this.getValue(tr, '26') + this.getValue(tr, '27')),
 164     '29': new ComputedLine((tr): number => clampToZero(this.getValue(tr, '25') - this.getValue(tr, '28'))),
 165     '30': new ComputedLine((tr): number => Math.min(this.getValue(tr, '24'), this.getValue(tr, '29'))),
 166     '31': new ComputedLine((tr): number => this.getValue(tr, '30') * 0.15),
 167     '32': new ComputedLine((tr): number => this.getValue(tr, '23') + this.getValue(tr, '30')),
 168     '33': new ComputedLine((tr): number => clampToZero(this.getValue(tr, '22') - this.getValue(tr, '32'))),
 169     '34': new ComputedLine((tr): number => this.getValue(tr, '33') * 0.20),
 170     '35': new ComputedLine((tr): number => this.getValue(tr, '17') + this.getValue(tr, '32') + this.getValue(tr, '33')),
 171     '36': new ComputedLine((tr): number => clampToZero(this.getValue(tr, '12') - this.getValue(tr, '35'))),
 172     '37': new ComputedLine((tr): number => this.getValue(tr, '36') * 0.25),
 173     '38': new ComputedLine((tr): number => sumFormLines(tr, this, ['18', '31', '34', '37'])),
 174     '39': new ComputedLine((tr): number => computeAmtTax(tr, this.getValue(tr, '12'))),
 175     '40': new ComputedLine((tr): number => Math.min(this.getValue(tr, '38'), this.getValue(tr, '39'))),
 176   };
 177 };
 178
 179 function computeAmtTax(tr: TaxReturn, amount) {
 180   const fs = tr.getForm(Form1040).filingStatus;
 181   const limit = tr.constants.amt.limitForRate28Percent[fs];
 182   const sub = limit * 0.02;  // Difference between the two rates.
 183
 184   if (amount < limit)
 185     return amount * Literal(0.26);
 186   return (amount * Literal(0.28)) - sub;
 187 }