How do I find the rest of my amended tax return for 2017? Why is it that all I can find is the supporting forms - not the 1040A, 1040X, Michigan 1040 forms?

How was the 2017 amended return prepared?    Did you prepare it while 2017 online TurboTax was still active, and it was all prepared online?   Or did you prepare the 2017 amended return after 2017 TurboTax shut down in October 2018, and thus had to do it in the desktop "amend software?"

So the PDF you download from "Your Tax Returns & Documents" is missing those forms you mentioned?

Also check this.  When you look in "Your Tax Returns & Documents", choose tax year 2017.   What is shown for "status" for the Federal and state returns?