Michigan MI-2210 calculations very wrong

[rochrunner]

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!

[Jeff_in_Michigan]

Found same issue.  My income and the taxes I paid varied through the year.  The Federal tax part of the program had me enter the different earnings by quarter along with taxes paid by quarter.  This did not translate over to the Michigan forms so it has me paying penalty for not paying my taxes on time.  I did pay my taxes on time but the program makes an automatic calculation based on averaging and will not allow me to input the actual timing of my withholding and estimated tax payments.  The Federal taxes allow this but the Michigan tax part does not allow this for payment of taxes.  This results in it showing I owe a penalty.  This is wrong and it appears the only way to fix this is to re-do my Michigan taxes on paper.  Very unhappy with Turbo Tax.