TurboTax accounts cannot be combined--one does not affect the other. Figure out which one has the correct information entered on the tax return and use that account to file from. If you are getting a rejection that says you already filed then either you did file from the other account---or your Social Security number has been used this year somehow--did you use the non-filer site to get a stimulus check? If you did that, that is why your return is being rejected.
https://ttlc.intuit.com/community/tax-topics/help/stimulus-how-to-file-your-return-after-getting-rej...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
