An addition or subtraction may be necessary if you sold your interest in a partnership and any increases or decreases were made to the federal basis of your partnership interest in taxable years prior to 1975, which resulted from partnership business or property located outside Wisconsin. (Prior to 1975, Wisconsin did not tax income from business or property located outside Wisconsin.) Compute any addition or subtraction due to a difference in basis on Wisconsin Schedule T.
Schedule T is not included in the program. You will need to complete this form manually and mail it with your printed and signed state return. The instructions for Schedule T can be found here.
Enter the additions in the Addition to Income section and subtractions in the Subtraction from Income section.
For further information, please see WI state instructions.