Did you do as directed and check the box in Screen 3 to apply all the new changes due to CARES? 

What happens to the bottom line if you remove that check mark.

FYI - IRS Pub 1345 would require a new signature that large a change:

"Taxpayers must sign a new declaration if the electronic return data on individual income tax returns is
changed after taxpayers signed the Declaration of Taxpayer and the amounts differ by more than either $50 to “Total income” or “AGI,” or $14 to “Total tax,” “Federal income tax withheld,” “Refund” or “Amount you owe.”