I'm experiencing this in ProSeries Professional 2018, 2019, and 2020. Have not downloaded 2021 yet. However, it needs fixed in prior versions so that when amending a Minnesota S-Corp return, the required form (Minnesota's Form M8X) prints when printing a Filing Copy and a Client Copy.
With federal amended returns I generally print the Amended form (1040X in that case) by itself rather than asking to print the entire form, (which just adds to my shredding pile).
Will the form print if you are in the form and use the print form button?
(I know nothing about Minnesota State Tax)