If the "Final Return" checkbox is not checked or "Initial Return" checkbox is not checked, then in the Return Header, the tax period end date must match data in the e-file database.
The IRS has rejected your return since the tax period end date in the return filed doesn't match with the IRS e-file database.
The tax period end date in the return is incorrect. For instance, if your organization follows a calendar tax year, the tax period end date in the return should be December 31. On the other hand, if your organization follows a fiscal tax, let's say from July to June, in which case, the tax period end date would be June 30. If the return has an end date other than June 30, then the IRS will reject it.
You need the correct the tax period, and re-transmit the return. Refer to this list of documents to confirm your organization's tax period.
Here's how you correct the tax period in the return:
For any further assistance, we recommend contacting the IRS e-Help Desk Toll-Free Number 1-866-255-0654.