If you qualify for the Wisconsin Homestead Credit Claim, you must submit a copy of your 2020 property tax bill (if you owned and occupied your home) or an original rent certificate signed by your landlord (if you rented your home).
Do you have copies of these documents on your computer? If not, scan them or take a picture. Then upload those images into your computer in personal docs and photos. From there, you can upload them into TurboTax.
Related Resources
Claiming Homestead Credit