If you already filed your return,  the IRS is going to give taxpayers the chance to enter their own banking information.  See the following:

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

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If you have not filed a return, or need to file a simple return to qualify for the Stimulus money, TurboTax setup where you can file a simple return for the stimulus money (if you are on Social Security or Disability, you do not have to file anything to get the stimulus money). See the following, scroll down to  What do I need to do to get my stimulus payment?, then  If you don’t need to file your taxes this year

https://turbotax.intuit.com/stimulus-check/

@Nannerwalter  If you are on Social Security or Disability you don't have to file anything to get your stimulus money.   The Treasury said social security recipients, who do not usually have to file a tax return to the IRS, will receive their economic impact payments directly and automatically into their accounts.

Treasury Secretary Steve Mnuchin said social security recipients will get their stimulus payments "very quickly" after the first IRS deposits are made in mid-April.

If you have not filed a return, or need to file a simple return to qualify for the Stimulus money, TurboTax setup where you can file a simple return for the stimulus money (if you are on Social Security or Disability, you do not have to file anything to get the stimulus money). See the following, scroll down to  What do I need to do to get my stimulus payment?, then  If you don’t need to file your taxes this year

https://turbotax.intuit.com/stimulus-check/