I live in Montana, I pay estimated taxes over the year, Turbo Tax doesn't ask me about that amount in the state section. How do I enter it?

I paid estimated taxes in quarterly chunks over 2018.  I don't other than my canceled checks I don't have any record.  TurboTax doesn't has me (that I see) for that amount when I am filling out the Montana details.  It just ends up telling me my tax bill is (for example) $1600 but I have already  sent $1200 to the MT Department of Revenue.  How do I handle this?

thanks,

jim