I just filed my return and made a crucial mistake. Is there anyway I can make the correction before it's filed. It's in pending status now

[DaraLO]

Once you've e-filed your return, you can only make changes if your return is rejected or you file an amended return.

If your return is rejected, you can revisit it and make any necessary changes then re-file.  https://ttlc.intuit.com/replies/3302275

If your return is accepted, then you will need to amend your return to correct any issues.  Please see the TurboTax FAQ below for instructions on amending a return:  https://ttlc.intuit.com/replies/3288565