IRS Form 8879 – Fillable PDF for XML E‑File Authorization

IRS Form 8879, the IRS E‑File Signature Authorization, is a critical step when you submit a tax return electronically. The form is provided as a fillable PDF that captures your signature and authorizes the IRS to accept the XML‑based e‑file data generated by tax software.

What Is IRS Form 8879?

This form links a traditional PDF signature page to the XML data package that tax software creates. By completing Form 8879, you confirm that the information in the XML return is correct and that you have reviewed the return before it is transmitted.

How to Fill Out the Form Using Formize

Instead of downloading the PDF and opening a separate editor, simply click the "Fill out this form" button on this page. The Formize PDF Filler app will load instantly, letting you enter data, add an electronic signature, and save the completed document—all within your browser.

Common Mistakes to Avoid

• Leaving any required field blank – the Formize filler will highlight missing information.
• Using a handwritten signature image that is not clear – choose the built‑in e‑signature tool for best results.
• Submitting the form before reviewing the accompanying XML return – always double‑check the tax return in your software first.

Where to Submit the Completed Form

After you finish, download the signed PDF and upload it with your tax software’s e‑file submission process, or attach it to the paper filing package if required by your tax professional.

FAQs About the PDF to XML Process

Read the FAQ section below for quick answers to the most common questions.