Tax990 Knowledge Base Have questions? We've got you covered! Get Answers Support Getting Started Tax990 Where can I find my IRS submission ID for the return I filed with the IRS? Once your return gets accepted by the IRS, you can find your IRS submission ID on the Filing History page of your Tax990 account. Was this helpful? Yes No Need more help? Get in touch with our dedicated support team Contact Us (704) 839-2321 [email protected]