I forgot a number on my account number for direct deposit can I fix it

[Critter]

If you have not filed yet log in and change it ... if the return was successfully efiled it is too late  .... unless they get this "portal" thing working ...  

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