Private Delivery Services should deliver returns, extensions and payments to the following Submission Processing Center street addresses only: Austin - Internal Revenue Submission Processing Center 3651 S IH35, Austin TX 78741 Kansas City - Internal Revenue Submission Processing Center 333 W. Pershing, Kansas City, MO 64108 Ogden - Internal Revenue Submission Processing Center 1973 Rulon White Blvd. Ogden, UT 84201 If using a private delivery service, send your returns to the street address above for the submission processing center (Austin, Kansas City, or Ogden) designated for your type of return: Where to File Tax Returns - Addresses Listed by Return Type. Note – when you mail a return from the post office to the IRS, the address to send the return is often different depending on whether you are sending the return with a payment or without a payment. However, when using a private delivery service to send a return to the IRS, all returns (including those with payments and those without payments) go to one of the street addresses above.