After you file


@ralphpeggy  wrote:

can I fix and the e-file


Yes, you can fix your tax return and e-file the return at any time on or before October 29, 2021.  After that date the 2020 tax return can only be printed and mailed.

See this TurboTax support FAQ for fixing a rejected tax return - https://ttlc.intuit.com/community/rejections/help/how-do-i-fix-a-rejected-return/01/26136