No, I don't think your do. As long as you used TurboTax last year and transferred the information (which it sounds like you did) there would not be a need for you to enter your 2016 MT AGI or MT Taxable Income because TurboTax already knows it.
This information is needed to figure our how much, if any, of your federal tax refund from last year is taxable to Montana this year. This is for MT filers who itemize their deductions.