If you didn't submit your return or if your state return was rejected, you can edit form 1040CR by reviewing the information you have entered in the section titled "Take a look at Michigan credits and taxes".
Login to your account.
Select State from the Left menu.
Select Prepare state.
Select continue next to Michigan.
Continue to the screen Take a look at Michigan credits and taxes and scroll down to Homestead Property Credit.
If you already filed your return, you need to amend it to make any changes.