I did enter my WI estimated tax payments into Turbo Tax, and they are reflected on form 1NPR. WI DOR sent me a letter saying that without sched U they assumed that income was received evenly throughout the year. They reduced my refund by the amount they calculated for underpayment interest. I did not have enough WI income in 2023 to pay taxes, and until December, I did not expect to have enough in 2024. Income rec'd 12/16 and est taxes (more than final amount due) paid 12/26/24. I need to file WI sched U and update 1NPR to indicate that. No other amendments to Federal, Virginia or Wisconsin forms are needed.
