E File Rejection & E-File Extension Rejecton
If a return is rejected by service how long do I have to fix it w/o it being filed late.
Can an extension be rejected by service and if so how long do I have to fix it before return is filed late.
If a return is rejected by service how long do I have to fix it w/o it being filed late.
Can an extension be rejected by service and if so how long do I have to fix it before return is filed late.
It's possible an extension would be rejected but not likely unless a return has been filed with that SSN.
See this article for details about deadlines and retransmitting: Electronic Filing Deadlines for Individual Returns and Extensions

4/15 midnight in your timezone