Where to Mail Your Iowa Tax Return: Paper, Amended, Estimated

Paper Iowa individual income tax returns go to Iowa Income Tax Document Processing, PO Box 9187, Des Moines, IA 50306-9187. That is where to mail your Iowa tax return whether you owe a balance, expect a refund, or come out even, and it is the same address for amended returns. Estimated tax payments use a different PO Box, and private carriers like FedEx or UPS need a street address instead.¹

Address for Paper IA 1040 Returns

Every paper-filed IA 1040 goes to the same place, regardless of refund or balance due:

Iowa Income Tax Document Processing
PO Box 9187
Des Moines, IA 50306-9187

This is the address printed on the return itself and listed on the Department of Revenue’s mailing address page.¹ If you’re sending an extension payment with an IA 1040V voucher before you file, that goes to the same PO Box.²

Address for FedEx, UPS, and Other Private Carriers

Private delivery services cannot deliver to PO Boxes. If you’re shipping through FedEx, UPS, or a similar carrier, use the Department of Revenue’s street address:¹

Iowa Department of Revenue
Hoover State Office Building
1305 E. Walnut St
Des Moines, IA 50319

If you’re filing close to the April 30 deadline, a tracked private carrier shipment or USPS certified mail with return receipt gives you proof of timely delivery.

Address for Amended Returns

Iowa no longer has a separate amended return form. The old IA 1040X was discontinued.³ To amend a prior-year return, file a new IA 1040 with the amended box in Part I checked, and attach an IA 102 Amended Return Schedule explaining what changed.⁴

Mail the amended package to the same PO Box used for original returns:

Iowa Income Tax Document Processing
PO Box 9187
Des Moines, IA 50306-9187¹

If the amendment produces additional tax owed, include payment with an IA 1040XV voucher, which is the voucher built for amended-return payments.

Estimated Tax Payments Go to a Different PO Box

Quarterly estimated payments on Form IA 1040ES do not use the same box as your annual return. They go here:¹

Iowa Department of Revenue
PO Box 10466
Des Moines, IA 50306-0466

Sending an estimated payment to PO Box 9187 instead can delay processing and leave your account showing a missed payment even though you paid on time.

What to Put in the Envelope

A paper return that arrives without the right attachments slows everything down. The Department of Revenue expects your mailing to include:⁵

Your completed and signed IA 1040. An unsigned return is treated as not filed.
Copies of all W-2s and 1099s, not only those showing Iowa withholding.
A full copy of your federal Form 1040.
Any Iowa-specific schedules that support credits or adjustments you claimed.

Taxpayers with a foreign mailing address enter their foreign city, country, and postal code in place of the domestic city, state, and ZIP fields, and convert any foreign-currency income to U.S. dollars using the same rules applied on the federal return.⁵

Sending a Payment With Your Return

If you owe tax, include a check or money order payable to the Iowa Department of Revenue along with an IA 1040V payment voucher. Write the tax type and tax year on the check.⁶ Do not send cash. The return and payment both go to PO Box 9187.

You can also pay electronically through GovConnectIowa even if you file the return on paper. The Department considers electronic payment the best method because it posts to your account faster.⁷

1
Iowa Department of Revenue. Mailing Addresses
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Iowa Department of Revenue. Note: Additional Information
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Iowa Department of Revenue. Note: Additional Information – Section: Amending Tax Returns
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Iowa Department of Revenue. Amending Tax Returns
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Iowa Department of Revenue. Individual Income Tax 1040 Expanded Instructions: Before You Begin
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Iowa Department of Revenue. Line 37: Total Amount Due – Section: Pay by Mail
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Iowa Department of Revenue. GovConnectIowa Frequently Asked Questions