@AmyC
That part about the credits isn't true. The IRS has said that those of us that have already filed but are now eligible for additional credits due to the tax exemption MUST file an amended return.
"However, taxpayers would have to file an amended return if they did not originally claim the EITC or other credits but are now eligible to claim them following the change in the tax law. Taxpayers can use the EITC Assistant to see if they qualify for this credit based upon their new taxable income amount. If they now qualify, they should consider filing an amended return to claim this money."
https://www.irs.gov/newsroom/irs-will-recalculate-taxes-on-2020-unemployment-benefits-and-start-issu...
