If you already filed your return, you cannot use the TurboTax Stimulus Registration, it is only for someone who has not filed a 20019 return or is not required to file a return. The IRS will give taxpayers a chance to fix or enter their direct deposit information.
The IRS does not have my direct deposit information. What can I do?
In the coming weeks, Treasury plans to develop a web-based portal for individuals to provide their banking information to the IRS online, so that individuals can receive payments immediately as opposed to checks in the mail.
https://www.irs.gov/newsroom/economic-impact-payments-what-you-need-to-know
