Estimated payments or installment bank accounts will not be used to process stimulus payments. Per the IRS:
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.
Follow the links for more information:
IRS Economic Impact Payments
IRS Coronavirus Tax Relief
TurboTax Corona Virus Tax Center Updates