"Later we plan to amend the 2020 and 2021 tax returns by completing 5884-A."

Read this entire topic.

Once again...

covid is not a Business Credit on Form 5884A from Wages. The Employee Retention provision for covid is for employer taxes, and it is part of 941 filing. Yes, for a prior year, you might need to amend your prior year, such as when you submitted for the ERC later (in 2022, for instance) and are getting it credited against 2021 employer taxes.

You need to read how Form 5884A is for impacts from a disaster that is a physical disaster such as tornado, hurricane, flood. Not covid.

These are different "retention" provisions. Make sure you are using the right  form for the right event. And if you are trying to take credit against wages or against the employer taxes.