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The changes being made should alert you to the line number(s) that will be affected on the amendment.

You would think so. But I don't see anything. The change in question is to add IRA contributions. Which changes my AGI, so I guess it's just line 1 of the WI tax form. (I could not find the form that is in progress. I'll try the link you shared. I do have a copy of the form I submitted.)