Form MI-2210 that is used to calculate penalties and interest for underpayment has some serious problems. It calculated a huge penalty and when I looked at the numbers, it had entries such as taking 25% of $30 and coming up with $25! There were also a couple of more minor errors. The form calculated penalties and interest of $104, but when I hand-calculated the form I came up with $38, which also checks out against the state-provided online calculator.
I guess I can override the entries so I can file the complete form using Ttax, but this should really be fixed!
