It depends.
As long as you have not paid yet, you can clear and start your return over.
Clear and start over your return
If you e-filed your return, you cannot delete the return as it has already been filed. You would need to amend your return to make any changes.
Please see the following to check the e-file status if you did submit the returns for filing.
Checking E-File status
State E-file pending
If you determine your returns were filed, you can use the following link to amend your return if you need to correct your returns.
Amend return
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