Temporary change of address created 2-state withholdings

I was forced into retirement from the airlines.  Official date was 6/29/2020.  As a result I had to sell my home in CO and find a place to rent.  Family in WI let me stay there for 3 months while the dust settled. 

I had a lot of important mailings due, so I put in a change of address with the company.  Then I had a 'final' paycheck dated 7/16/2020 from some accrued vacation hours.  Unfortunately it showed as WI earnings.  My Fed. W-2 shows 'Total State' in Line 15, but there are two state filings; CO for my actual 'employed' earnings there, and WI, for the residual (after retirement) vacation 'clean-up' pay.

TurboTax indicates I 'probably' don't have to file a WI return.  I'm confused, and would rather not pay for, and file a WI return if I don't have to.

Any input is appreciated... thanks.