After you file

No, registration is only for non-filers.

See this IRS website - https://www.irs.gov/newsroom/economic-impact-payments-what-you-need-to-know

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.