Mail your Form 1040 to the IRS service center that covers your state
The address where you send your Form 1040 depends on which state you live in, not where you work or where you file from. The IRS divides the country into regional service centers, and each one handles returns from specific states. Sending your return to the wrong address will delay it — the IRS will have to forward it, which can add weeks to your refund timeline.
You can find your state's correct mailing address on the IRS website under "Where to File" or in the Form 1040 instructions that come with the tax form itself. The instructions include a full table organized by state. If you are filing from outside the United States, there is a separate address for overseas filers.
The address changes slightly depending on whether you are including a payment with your return or sending it in for a refund. Since you are expecting a refund, you will use the refund address for your state, not the payment address.
Key Takeaways
- Each state has one correct IRS mailing address, and using the wrong one delays your refund by adding extra processing steps.
- The Form 1040 instructions include a table showing the mailing address for your state based on whether you are sending a payment or expecting a refund.
- Write your Social Security number on the outside of the envelope so the IRS can match it to your return if the envelope gets separated.
- Mail your return at least one week before the tax deadline to leave time for postal delivery and IRS processing.
- Keep a copy of your return and proof of mailing (receipt or tracking number) until you receive your refund.
How to address the envelope correctly
Write the IRS service center address in the center of the envelope, just as you would for any piece of mail. Use the address listed in the Form 1040 instructions for your state under the "refund" column, not the "payment" column. The address will include a street address, city, state, and ZIP code.
On the outside of the envelope, write your Social Security number in large numbers in the upper left corner, above your return address. This helps the IRS match the envelope to your return if they get separated during processing. Do not put your Social Security number on the back of the envelope or anywhere else — only the upper left corner of the front.
Use a standard business envelope or a larger envelope if your return includes multiple pages or schedules. Do not fold the Form 1040 itself more than necessary. The IRS processes returns through automated scanning equipment, and creases or folds can cause the machine to misread your information.
When to mail your return to avoid delays
Mail your return at least one week before the tax deadline — usually April 15, though it shifts to April 16 or 17 in some years when April 15 falls on a weekend or holiday. Mailing one week early gives the postal service time to deliver it and gives the IRS time to receive it before the deadline. If you mail it the day before the deadline, postal delays could cause it to arrive after April 15, which counts as late even though you mailed it on time.
The IRS considers a return filed on the date it is postmarked, not the date it arrives. So if you mail it on April 10 and it arrives on April 20, the postmark date of April 10 is what counts. However, you still need to mail it early enough that the postal service can deliver it and postmark it before the deadline.
If you are mailing your return close to the deadline and worried about postal delays, consider using certified mail or a tracking service. This gives you proof that you mailed it on time, which protects you if there is a dispute about when the IRS received it.
What to include with your Form 1040
Include all schedules and forms that go with your return. If you have W-2s from your employer, you do not mail those — you keep them for your records. The same is true for receipts, invoices, and other supporting documents. The IRS only wants the actual tax forms and schedules you filled out.
If you are including a check for taxes owed, make it payable to "United States Treasury" and write your Social Security number on the check itself. If you are expecting a refund, do not include a check. Just mail the Form 1040 and any schedules.
Do not mail cash, and do not send original documents like birth certificates or deeds. If the IRS needs to see supporting documents, they will ask you for them after they receive your return.
Tracking your mailed return
Use certified mail with return receipt to get proof that the IRS received your return. The postal service will give you a tracking number and a receipt showing when the package was delivered. Keep this receipt until you receive your refund — it proves you mailed the return on time if there is ever a question about the filing date.
You can also use regular mail and keep the receipt from the post office showing the date and time you mailed it. This is less formal proof than certified mail, but it still shows you mailed it before the deadline.
After you mail your return, you can check the status of your refund using the IRS "Where's My Refund?" tool on the IRS website. This tool updates once per day and shows whether the IRS has received your return, is processing it, or has issued your refund. It typically takes three to five weeks for a mailed return to show up in this system after the IRS receives it.
What happens if you mail it to the wrong address
If you mail your return to the wrong IRS service center, the postal service will eventually forward it to the correct center. This adds one to two weeks to the processing time. Your return will still be processed, but your refund will arrive later than it would have if you had used the correct address from the start.
You can avoid this by double-checking the address in the Form 1040 instructions before you seal the envelope. The instructions are updated each year and include the current addresses for all states. If you are unsure which state address to use, look up your state in the table and follow the address listed for refunds.
If you realize you mailed it to the wrong address after you have already sent it, there is nothing you can do except wait. The IRS will process it once it arrives at the correct center. You can still track your refund status using the "Where's My Refund?" tool, which will show when the return is received and processed.
Mailing address table for common states
| State | Mailing Address (Refund) |
|---|---|
| Alabama, Georgia, North Carolina, South Carolina | IRS, 4800 Buford Drive, Chamblee, GA 30341 |
| Alaska, Arizona, California, Hawaii, Nevada, Oregon, Washington | IRS, 1301 Clay Street, Oakland, CA 94612 |
| Arkansas, Louisiana, Mississippi, Oklahoma, Texas | IRS, 3651 S. Interregional Highway 35, Austin, TX 78741 |
| Connecticut, Delaware, Maine, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont | IRS, 201 Varick Street, New York, NY 10014 |
| Colorado, Kansas, Nebraska, New Mexico, Utah, Wyoming | IRS, 1100 Center Street, Denver, CO 80202 |
This table shows addresses for five regional service centers. For a complete list of all states and territories, see the Form 1040 instructions or visit the IRS website and search for "Where to File." The addresses are updated each tax year, so always check the current year's instructions before mailing.
Frequently Asked Questions
Do I have to mail my return, or can I file online instead?
You can file online using tax software or the IRS Free File program, which is faster and more secure than mailing. Online filing typically results in a refund within 21 days if you choose direct deposit. Mailed returns take three to five weeks or longer. Online filing is free for most people and reduces the risk of errors or lost mail.
What if I mail my return but forget to include my Social Security number on the envelope?
The IRS can still match your return to your account using the Social Security number on the Form 1040 itself. However, writing it on the envelope speeds up the process and reduces the chance of the envelope getting separated from the return. If this happens, your return will still be processed, but it may take longer.
Can I mail my return to a different address if I do not like the one for my state?
No. You must use the address listed for your state in the Form 1040 instructions. Mailing to any other IRS address will delay your return because it will have to be forwarded. The addresses are organized by region for processing efficiency, and using the correct one is the fastest way to get your refund.
How do I know if the IRS received my mailed return?
Use the IRS "Where's My Refund?" tool on the IRS website, which updates once per day. It typically takes three to five weeks after mailing for your return to appear in this system. If you used certified mail, you will also have a delivery receipt from the postal service showing when it arrived.
What if my refund does not arrive within the expected timeframe?
If more than 21 days have passed since the IRS received your return and the "Where's My Refund?" tool shows it has been processed, contact the IRS at 1-800-829-1040. Have your Social Security number, filing status, and expected refund amount ready. The IRS can investigate whether your refund was issued and help you track it down if there is a problem.