From 91099b36b15c56a91881dd716f864e308c92e186 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Fri, 21 Feb 2020 08:28:09 -0500
Subject: [PATCH] Model most of the first page of 1040.

---
 src/fed2019/Form1040.ts | 49 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/src/fed2019/Form1040.ts b/src/fed2019/Form1040.ts
index 28c4c3c..4142fd3 100644
--- a/src/fed2019/Form1040.ts
+++ b/src/fed2019/Form1040.ts
@@ -1,8 +1,15 @@
 import Form from '../Form';
 import TaxReturn from '../TaxReturn';
-import { Line, AccumulatorLine } from '../Line';
+import { Line, AccumulatorLine, ComputedLine, ReferenceLine } from '../Line';
+
+export enum FilingStatus {
+  Single,
+  MarriedFilingSingle,
+  MarriedFilingJoint,
+};
 
 export interface Form1040Input {
+  filingStatus: FilingStatus;
 };
 
 export default class Form1040 extends Form<Form1040Input> {
@@ -13,6 +20,46 @@ export default class Form1040 extends Form<Form1040Input> {
       new AccumulatorLine('1', 'W-2', '1', 'Wages, salaries, tips, etc.'),
       new AccumulatorLine('2a', '1099-INT', '8', 'Tax-exempt interest'),
       new AccumulatorLine('2b', '1009-INT', '1', 'Taxable interest'),
+      new AccumulatorLine('3a', '1099-DIV', '1b', 'Qualified dividends'),
+      new AccumulatorLine('3b', '1099-DIV', '1a', 'Ordinary dividends'),
+      // 4a and 4b are complex
+      // 4c and 4d are not supported
+      // 5a and 5b are not supported
+      // 6 - Sched D
+      new ReferenceLine<number>('7a', 'Schedule 1', '9', 'Other income from Schedule 1'),
+
+      new ComputedLine<number>('7b', (tr: TaxReturn): number => {
+        const lineIds = ['1', '2b', '3b', '4b', '4d', '5b', '6', '7a'];
+        const lines = lineIds.map(l => this.getValue<number>(tr, l));
+        return lines.reduce((acc, cur) => acc + cur, 0);
+      }, 'Total income'),
+
+      new ReferenceLine<number>('8a', 'Schedule 1', '22', 'Adjustments to income'),
+
+      new ComputedLine<number>('8b', (tr: TaxReturn): number => {
+        return this.getValue<number>(tr, '7b') - this.getValue<number>(tr, '8a');
+      }, 'Adjusted gross income'),
+
+      // 9 - Deduction
+
+      new ComputedLine<number>('10', (tr: TaxReturn): number => {
+        const taxableIncome = this.getValue<number>(tr, '8b');
+        let use8995a = false;
+        switch (this.getInput('filingStatus')) {
+          case FilingStatus.Single:              use8995a = taxableIncome <= 160700; break;
+          case FilingStatus.MarriedFilingSingle: use8995a = taxableIncome <= 160725; break;
+          case FilingStatus.MarriedFilingJoint:  use8995a = taxableIncome <= 321400; break;
+        };
+        return 0;
+      }, 'Qualified business income deduction'),
+
+      new ComputedLine<number>('11a', (tr: TaxReturn) => {
+        return this.getValue<number>(tr, '9') + this.getValue<number>(tr, '10');
+      }),
+      new ComputedLine<number>('11b', (tr: TaxReturn) => {
+        const value = this.getValue<number>(tr, '8b') - this.getValue<number>(tr, '11a');
+        return value < 0 ? 0 : value;
+      }, 'Taxable income'),
     ];
   }
 };
-- 
2.22.5