Start with the return as originally filed. https://proconnect.intuit.com/community/help-articles/help/amending-recreating-a-return-in-lacerte/0...

Make a copy of that return and renumber it (I use XXX-ORIG for ORIGinal)

Check the box in Screen 3 to indicate you are making it conform to CARES. Beyond that I am unsure, but it should create a new return with the offending limitation gone. You may need to do a bit more massaging. Come back if you hit a snag.