Tax990 Knowledge Base Have questions? We've got you covered! Get Answers Support I am an ERO. What proof does Tax990 want me to attach when I start filing? I am an ERO. How to file a 990 return using Tax990? What is EFIN, and how can I receive that? I don’t have an EFIN? Can I e-file my Form 990 return? Need more help? Get in touch with our dedicated support team Contact Us (704) 839-2321 [email protected]
