In computing 2024 Iowa Estimates ProSeries is reducing the net Iowa tax (gross tax, less out of state) by the out of state credit again.  If you have a gross Iowa tax of $3,000 and an out of state credit of $1,400 the net tax is $1,600 and should be the basis of 2024 estimates.  ProSeries computed Iowa estimates is $200, the net tax of $1,600 reduced by double counting the out of state credit.  

I ran into this problem 4 or 5 years ago and ProSeries said they would fix it for next tax season.  They still haven't fixed it.