Fill out the info at the top of the 1116 input then go to the Carryovers

Specifically I have a FTC created in 2020, that needs to be carried back to 2019.  A negative number cannot be added to the C/O input screen.

Checkout https://proconnect.intuit.com/community/proconnect-tax-discussions/discussion/i-have-unused-amp-exce... and see if that gives you guidance. @itonewbie might be willing to help you out either here or in that thread, if you reach out the way I just did by typing the @name of the person you want to call into the discussion.