If you already filed your return & it has been accepted, the only way to change something is to amend your return.  Amended returns must be mailed.

If you have not filed your return yet, you can go back to the section you need to change.

How do I amend a 2019 return in TurboTax?

https://ttlc.intuit.com/community/tax-topics/help/how-do-i-amend-a-2019-return-in-turbotax/00/123845...