After you file

Tonight I learned via the news about Turbo's stimulus registration.  Since I've already filed my 2019 (via Turbo), does that mean I won't be able to register for that service when I just need to change my bank account number?

 

Or will it do any good to file an amended return to just do that?

 

If I click on filing an "amended" I'd be hoping I could skip thru all of the questions as it's reviewing my return, and then enter the correct bank info to re-submit it.