Free 1040 Tax Return Validator

Run common format and amount-relationship checks on entered 1040 data. Compare results with the source return and current instructions.

Enter 1040 Data

Fill in the fields below to validate your extracted tax return data

Taxpayer Information

Taxpayer Name *

Taxpayer SSN

Tax Year

Filing Status

Income

Wages / Salaries (Line 1a)

Total Income (Line 9)

Adjusted Gross Income (Line 11)

Taxable Income (Line 15)

Tax & Payments

Total Tax (Line 24)

Federal Tax Withheld (Line 25a)

Refund (Line 35a)

Amount Owed (Line 37)

Validation Results

Click "Validate 1040 Data" to see results

Enter your 1040 data above and click validate.

Extract supported 1040s for review

Upload a representative supported 1040 PDF to receive configured fields and confidence signals, then compare them with the source.

Free 1040 Parsing Guide

How lenders and tax professionals can test a review-first 1040 extraction workflow.

About This Validator

Income Consistency Check

Verifies that AGI does not exceed total income, and that taxable income does not exceed AGI, per standard 1040 math.

Refund / Owed Reconciliation

Compares entered withholding and total tax with the entered refund or amount owed. Differences may reflect credits, payments, omitted fields, or source-entry issues.

Client-Side Only

All validation runs in your browser. Your tax data never leaves your device.