Send your federal return to the IRS address in Fresno, California

If you are mailing a paper federal tax return from California, send it to the Internal Revenue Service at 5045 East Butler Avenue, Fresno, CA 93888. This is the processing center that handles federal returns from California and several other western states. The IRS does not accept federal returns at state tax offices — California's Franchise Tax Board handles state returns separately.

The address changes depending on whether you are enclosing a payment. If you owe federal taxes and are sending a check or money order, use the same Fresno address. If you are filing without a payment, you can still use Fresno. Double-check the current address on the IRS website or your tax form instructions before mailing, as the IRS occasionally updates processing center locations.

Mail your return during tax season (January through mid-April for most filers) to avoid delays. The IRS typically processes paper returns within 21 days of receipt, though this can take longer during peak season. Keep a copy of your return and proof of mailing for your records.

Key Takeaways

  • Mail federal returns to the IRS Fresno processing center at 5045 East Butler Avenue, Fresno, CA 93888, regardless of whether you include a payment.
  • Do not send federal returns to California's Franchise Tax Board — that office handles state returns only.
  • Use certified mail or a tracking method so you have proof the IRS received your return.
  • Paper returns take longer to process than e-filed returns, which are accepted year-round and processed within 21 days in most cases.

When to mail instead of e-file

Most filers should e-file their federal return rather than mail it. E-filing is faster, more accurate, and you receive confirmation that the IRS received your return. The IRS accepts e-filed returns throughout the year, and processing typically takes 21 days or less.

You might mail a paper return if you do not have internet access, prefer a paper trail, or are filing an amended return on Form 1040-X. Some filers also mail returns when they need to include documents the IRS requires in physical form, though most supporting documents can now be uploaded during e-filing. If you are unsure whether your situation requires mailing, check the instructions for your specific tax form on the IRS website.

What to include with your mailed return

Include your completed Form 1040 (or the appropriate form for your filing status), all required schedules and attachments, and a payment if you owe taxes. Write your Social Security number on any check or money order you send. Do not send cash.

Attach a cover letter only if you are including documents the IRS requested or if you are filing an amended return. For amended returns, use Form 1040-X and mail it to the same Fresno address. Include a brief explanation of what you are correcting and why. Keep copies of everything you mail.

Do not staple or paperclip your documents together. Stack them in order (Form 1040 first, then schedules, then attachments) and use a rubber band or envelope to keep them together during mailing.

How to track your mailed return

Use certified mail with return receipt requested when you mail your federal return. This costs a few dollars extra but gives you proof that the IRS received your envelope. Write down the tracking number and keep it with your tax records.

After mailing, you can check the status of your return using the IRS "Where's My Refund?" tool on the IRS website. This tool updates once per week and shows whether the IRS has received and processed your return. You will need your Social Security number, filing status, and the expected refund amount to use the tool.

If you do not receive a response within 21 days of mailing, contact the IRS at 1-800-829-1040 to confirm receipt. Have your certified mail tracking number ready when you call.

State return address for California residents

Your California state return goes to a different address. Mail your Form 540 (California resident income tax return) or Form 540-2NR (nonresident return) to the Franchise Tax Board at P.O. Box 942840, Sacramento, CA 94279-0040. Some filers use the street address instead: 915 L Street, Sacramento, CA 95814.

Like federal returns, California state returns are processed faster if you e-file. The Franchise Tax Board accepts e-filed returns year-round and typically processes them within 21 days. You can e-file your state return through the same software or service you use for your federal return.

Mailing important date and extensions

The federal tax important date is April 15 each year (or the next business day if April 15 falls on a weekend or holiday). Your return must be postmarked by midnight on the important date date. The postmark date, not the date the IRS receives it, determines whether you filed on time.

If you cannot file by April 15, you can request an automatic six-month extension using Form 4868. File the extension before the April 15 important date. An extension gives you until October 15 to mail your return, but it does not extend the important date for paying taxes you owe. If you owe federal taxes, pay as much as you can by April 15 to avoid penalties and interest on the unpaid balance.

Frequently Asked Questions

Can I mail my federal and state returns to the same address?

No. Federal returns go to the IRS in Fresno, and California state returns go to the Franchise Tax Board in Sacramento. They are separate agencies with separate processing centers. Mail them in the same envelope if you want, but address each return to its correct destination.

What happens if I mail my return to the wrong address?

If your return reaches a wrong IRS office, it will be forwarded to Fresno, but this delays processing. If it reaches a non-IRS address, it may be lost. Use certified mail so you have proof of where you sent it. If you are concerned your return went to the wrong place, call the IRS at 1-800-829-1040 with your tracking number.

Is it better to e-file or mail my federal return from California?

E-filing is faster and more reliable. The IRS processes e-filed returns in 21 days or less, while mailed returns can take 4 to 6 weeks. E-filing also reduces errors and gives you when ready confirmation of receipt. Mail only if you cannot e-file or have a specific reason to file on paper.

Do I need to mail my return if I use a tax preparation service?

No. Tax preparation services and software can e-file your return for you. Ask your preparer or check your software settings to confirm your return is being e-filed rather than mailed. E-filing through a service is free or low-cost and faster than mailing.

What if I owe taxes — do I still mail to Fresno?

Yes, use the same Fresno address whether you are sending a refund or a payment. Include your check or money order with your return, made payable to "United States Treasury." Write your Social Security number on the check. Do not send cash.