The Best Internal Revenue Service Submission Processing Center Austin Tx References. When sending my tax returns by fedex internationally, i am to send it to: Taxpayers sending tax returns by express or certified mail from outside the country should mail to the.
Learn the correct way to address mail to the austin submission processing center, ensuring timely and accurate delivery. Below are the street addresses to all submission processing centers. Taxpayers sending tax returns by express or certified mail from outside the country should mail to the.
