Amending 2019 Return

While doing my 2020 tax return I realized I forgot to include the contributions we made to my kids' Edvest accounts on our 2019 WI return. Info from that return needs to be entered into the 2020 WI return for the contributions we made in 2020.

 

Anyway my question is since I only need to amend my WI 2019 return do I also need to mail in an amendment to my 2019 Fed return?

 

I did the amendment in TurboTax and it is saying my Fed refund is $0 (WI's return is now $39 for 2019). I've never had to do an amendment before and I'm not sure what to do.