The line numbers on this worksheet are not covered in the M1PR instructions. The links in previous replies do not work. This looks very bad when there is no help or instruction links the way the worksheet is presented in TurboTax.
https://www.revenue.state.mn.us/sites/default/files/2023-06/m1pr-inst-22_0.pdf
Can you clarify what exactly you are looking for? The list of "additional nontaxable income" is on pages 8 and 9 of the link that you gave. Do you have any of that type of income that you need to add, that TurboTax has not already automatically added?
You can file your M1PR free of charge at the MN Dept. of Revenue Property Tax Refund site, and if you're a homeowner, you can e-file it through the MN DOR's Property Tax Refund Online Filing System.
Apparently the worksheet in TurboTax is an expanded approximation of the M1PR-AI form. The worksheet line items are not documented in any instructions that I can find. This is described as line 5 in the M1PR instructions and expanded to the worksheet in TurboTax..