For the state of Wisconsin, why is the Married Couple Credit not appearing under possible state credits, even when both spouses are employed? How do I add this?

Both my spouse and I are employed and have received this credit the past couple of years, but it does not appear under possible credits for us now. I see that the credit is still available on the 2020 Wisconsin 2020 I-010 Form 1. How do I find and add this credit in Turbotax?