Hi @freshy70,
Thanks for posting your question! Here’s a couple support articles that may help with this:

Common questions about Net Operating Losses (NOLs), Form 172 and diagnostic ref 61199 in ProConnect ...

Entering net operating loss (NOL) carryovers and carrybacks in Form 1120 in ProConnect Tax

If you need further assistance with this we would reach out to ProConnect Support, as they can best help with your specific situation.
Looking forward to seeing more of your contributions in the Community!