Sorry, TurboTax accounts cannot be merged. You can use one or the other of the TurboTax online accounts and then manually enter the tax data from the other spouse.
However, since you are now married it would be better if you created a New online account and entered your tax data as a married couple.
If you have not paid for the online edition you are using, have not filed your tax return or registered the Free edition, then you can clear your return and start over. Click on Tax Tools on the left side of the program screen while working on the 2021 online tax return. Click on Clear & Start Over.
