@NoahtdArk - all you assumptions are correct, but the checks are going to be prioritized by income and won't begin until April 24.
so the week of April 24, if you income was under $10k on your tax return, the checks will be mailed
so the week of May 1 , if you income was under $20k on your tax return, the checks will be mailed
etc.
so there should be plenty of time to update your banking info before the IRS is ready to mail a check,
