IF you are on a Windows Computer:
1) Shut down TTX (save your file first)
2) Completely Reboot your computer.
3) download and run the Manual Update (can take 5-10 min to install on W10).
https://ttlc.intuit.com/community/updating/help/manually-update-turbotax-for-windows-software-basic-...
4) Restart your TTX software, open your tax file, and run thru the Federal dn State error checks again.
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Still??....off to Ciustomer Support:
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*