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# Mail Your Tax Return with USPS

Use the U.S. Postal Service® to mail your tax return, get proof that you mailed it on a specific date with Certified Mail® or Registered Mail® service, and track its arrival at the IRS.

Federal Tax Deadlines

April 15, 2026: Federal tax return filing deadline for tax year 2025.

The IRS considers a tax return to be filed on time if your envelope:

- Is properly addressed
- Has enough postage
- Is postmarked by the filing due date

As long as your envelope meets the above criteria, your tax return will be considered on time (even if it's delivered after the due date).

Important: To ensure your tax return is postmarked on the day you mail it, ask a retail associate at a Post Office retail counter to hand-cancel it for free. Learn More.

Check Post Office Hours

## Mailing Tips

- Send to the Correct Address
  Check the IRS website for where to mail your tax return. Write both the destination and return addresses clearly or print your mailing label and postage.
  Where to Send Paper Tax Returns
- Use Correct Postage
  Weigh your envelope using a kitchen scale or postage scale and apply the right amount of postage. Most tax returns are several pages long and weigh more than 1 oz. Tax returns sent without enough postage will be returned. Calculate Postage

### Quick Links

- Click-N-Ship Online Postage
- Compare Mail Service Costs
- Insurance & Signature Services

- Meet the Postmark Deadline
  If your tax return is delivered after the filing due date, the IRS considers it on time if it is postmarked by the due date. To ensure that your tax return receives a postmark on the day you mail it, ask a retail associate at a Post Office retail counter to hand-cancel it for free. Learn more.
  Find USPS Locations

## Proof of Mailing & Delivery

For added peace of mind, you can purchase Certified Mail or Registered Mail service at the Post Office retail counter when you mail your tax return. You’ll get a receipt to prove when you mailed your item, and you can see when it was delivered (or that a delivery attempt was made).

Note: After you send your tax return, keep your receipt in a safe place. The Postal Service does not keep copies of receipts.

Learn More

Also, when you use a USPS service with tracking, your tracking number will provide updates as your item travels to its destination, including the date and time of delivery or attempted delivery. You can access tracking information for non-signature items for 120 days (2 years for signature items). With the USPS Tracking Plus® service, you can buy extended tracking history for up to 10 years.

USPS Tracking Plus

## Mailing Options & Services

These mailing services apply a postmark to your return. If your return is postmarked by the IRS deadline date, it is considered on time. With Click-N-Ship® service, you can pay for postage online and print a shipping label from your own computer. Generating a Click-N-Ship label with postage creates an electronic record for the label on that specific date, so it is important that you send your package on the shipping date you used to create the label. Your online Click-N-Ship account will save your shipping history for six months.

Print a Shipping Label

- Priority Mail Express®

- Delivery in 1-3 days
- USPS Tracking® included
- Eligible for Click-N-Ship

- Priority Mail®

- Delivery in 2-3 days
- USPS Tracking included
- Eligible for Click-N-Ship
- Eligible for Certified Mail or Registered Mail

- First−Class Mail®

- Delivery in 1-5 days
- Extra services available
- Eligible for Certified Mail or Registered Mail

## IRS Tips & Help

The Postal Service recommends that you confirm all tax information with a tax professional or the IRS.

Visit the IRS Website