<prompt> Human: Im helping my brother with refile his 2016 return. Last year his e-file was rejected due to not knowing his AIG. Im resubmitting it, but not sure if I just mail it in or do I need to file a 1040X.What do I do?EDIT: We are just going to mail it in and get the refund. Thanks for the help!  <response>: If it was never accepted, just mail in the return. If you were owed a refund, there is no problem. 