How do I amend my Wisconsin state return with a Schedule U?

[aespinosa1997]

Hi everyone, 

A few months ago I filed my taxes, and afterwards I received a Notice of Amount Due from the Wisconsin Department of Revenue for some underpayment interest. As such, I am trying to amend my return, and from my own research, it seems that the correct form to use is a Wisconsin Schedule U, so I can change line 74 of my Wisconsin return. However, for the life of me I cannot figure out where to add this form to my return in the software while trying to amend my return. The software search bar has no information on how to do this, and the Turbotax help AI has been equally unhelpful by telling me to click different nonexistent buttons every time I ask the question. Can someone please guide me through what I need to do in order to add this form and amend my return? I would greatly appreciate any help, thank you!

[MaryK4]

You just have to sign in to your 2023 tax return and indicate that you need to amend your tax return.  Follow the questions and add the underpayment of estimated tax penalty.  

See DOR Individual Income Tax Estimated Tax Payments.