I found the solution.
Please go to "3800 Worksheet" in Forms View. Scroll down almost all the way to the bottom to the section named "Credit Carryforwards and Carrybacks". On lines 1-6, enter the details for your carryforward credit. Once done, you will see the amount reflected in Part IV of Form 3800 and then ripple up to Form 3800, line 4.
No overrides will be necessary.
It worked for me. It should work for you. Good luck.
