I'd be happy to help you understand why your e-file was rejected.
Common Rejection Reasons:
When an electronically filed return is rejected by the IRS, the Electronic Return Originator (ERO) must notify the taxpayer within 24 hours and provide the reject codes with an explanation [1]. The specific reject codes will indicate the exact issue with your return.
Some returns cannot be e-filed at all, including fiscal year returns, returns containing forms or schedules that cannot be processed electronically, and returns with taxpayer identification numbers in the range of 900-00-0000 through 999-99-9999 (with certain exceptions for adoption and individual taxpayer identification numbers) [2].
Next Steps:
If your return was rejected and cannot be corrected for electronic filing, or if you choose not to file electronically, you must file a paper return by the later of the return's due date or 10 calendar days after the IRS notifies you of the rejection [1].
To provide more specific guidance, could you share the reject code(s) you received? This would help identify the exact issue and the best way to resolve it.