Turbo Tax calculated that I am subject to AMT for State (MN) and included Schedule M1MT that states"... must include... 6251" yet TurboTax did NOT generate for 6251. Is there a way to have TurboTax generate 6251 so calculations match?

Same problem here for 2019 tax year. Turbo Tax didn't print out a 6251 (not subject?) but MN e-file failed due to needing it included for M1MT. Apparently 6251 needs to be filled out (with what?) and mailed in with M1MT. 

Open up the forms view and see if form 6251 has been filled out but not printed.  You can select it and print it out.   If that fails,  there is a box at the end of the from that allows you to file the form even if not required.