I recommend reviewing the entries. First, log completely out and close the browser. Re-open in Chrome and go to the State interview for Wisconsin.
The contribution should be entered during the Wisconsin interview and will not reduce Wisconsin income to less than zero. Be sure to indicate the contribution for 2020 for each beneficiary at the bottom of each screen before clicking Continue With My Return.
From Here's the income that Wisconsin handles differently, scroll down to Education and College Savings Account and Start. Be sure to enter these individually for each beneficiary and select B - Contribution to other's EdVest or Tomorrow's Scholar account.
This is captured on line 32 Contributions to a Wisconsin State-Sponsored College Savings Program of Schedule M Additions to and Subtractions from Income. Schedule CS must be included, as well. TurboTax will automatically add what is needed.
Click the link for: the most recent information about the Wisconsin 529 College Savings Program limits for 2020.
