The IRS is setting up a portal for people to update their bank account information. We will have more information once the government finalizes the details.
In the meantime, you can visit the following links for the most recent updates:
TurboTax Corona Virus Updates or IRS Corona Tax Relief.
As for your damaged 2019 refund check, you will need to get hold of the IRS at 1-800-829-1040 between the hours of 7 a.m. and 7 p.m.