Great information, but I wanted to add that last year with 2020 taxes there was a known issue/glitch with reporting on Form 8606, and inherited IRAs were incorrectly showing up on Form 8606. In my case, Turbo Tax was erroneously using up part of my traditional IRA basis towards my inherited IRA distribution. The issue was finally corrected last year, but wanted to mention it in case this glitch is showing up again in 2021!
