Tax Form PDF Filler

1. Select Tax Year

Tax Year:

2. Upload Excel File

Choose Excel file (.xlsx):

Ready. Please upload an Excel file.

3. Download Filled PDFs

🔒 Privacy & Security

Your data never leaves your computer. This application runs entirely in your browser (client-side). No data is uploaded to any server. Your Excel file and PDFs are processed locally on your device.

💡 Tip: Your Excel file only needs numerical data (amounts, dates, quantities) - no personal information like names, addresses, or SSN is required.

ℹ️ How to Use

Select your tax year from the dropdown
Prepare one Excel file with sheets named:
- f1040 - Form 1040 data
- f8949 - Capital gains/losses
Download our Excel template with pre-formatted sheets and column headers.
Upload the Excel file - The app will parse your data
Download the ZIP file containing all filled PDFs

✨ What Each Form Does

Form 1040 - Individual Income Tax Return

Automatically fills all line items from your data
Performs addition and subtraction calculations
Computes totals across pages

Form 8949 - Capital Gains & Losses

Calculates gain/loss for each transaction (Proceeds - Cost - Adjustment)
Automatically separates short-term (≤1 year) and long-term (>1 year) based on dates
Computes total proceeds, total cost basis, and total gain/loss
Creates multiple 8949 forms if you have more data