Where do you mail 941 Forms from Washington with payment?

If you're mailing Form 941 with payment from Washington, send it to the appropriate IRS address based on whether you're including a payment or not. For payments, mail it to: Department of the Treasury, Internal Revenue Service, P.O. Box 804522, Cincinnati, OH 45280-4522. If you're not sending a payment, use: Internal Revenue Service, P.O. Box 2578, Oklahoma City, OK 73194. Be sure to check the latest IRS guidelines or instructions on the form for any updates.