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Form 4868 Guide 2026: Automatic Tax Extension PDF & Instructions
Complete overview of IRS Form 4868. Learn how to request an automatic 6-month extension of time to file your Form 1040 individual tax return.
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What Is IRS Form 4868?
IRS Form 4868 (Application for Automatic Extension of Time to File U.S. Individual Income Tax Return) is an official form that grants individual taxpayers an automatic 6-month extension to submit their annual Form 1040.
Important Extension Dates for 2026
- April 15, 2026: Deadline to submit Form 4868 and pay any estimated federal tax due.
- October 15, 2026: Extended deadline to file your finalized Form 1040 return.
Extension to File vs Extension to Pay
Crucial Distinction: An extension of time to file is NOT an extension of time to pay. To avoid late-payment interest and penalties, estimate your tax liability and pay any balance due by April 15, 2026.
W-9 Forms & Extension Preparation
If you are waiting for missing 1099 forms from clients before completing your Form 1040, ensure you provide clients with an updated Form W-9 or generate contractor pay records with our Free Paystub Generator.