I figured that was what was happening. TT has long calculated Wisconsin cap gains/losses from the underlying data rather than relying on federal schedule D which was obvious from the results (Wisconsin dollar rounded each individual transaction whereas federal kept the pennies and only rounded the totals...the differences could be a lot if there were a lot of transactions). This year they seem to be relying on federal schedule D but forgot to scrap the old programming so I'm getting doubled up. Rather than adopt your solution I'm going to use Wisconsin's on-line e-file system and hope TT fixes the error in the future.
