Does inherited traditional IRA share basis with my prior non-deductible IRA contributions (form 8606)?

In the past, TurboTax was tracking my non-deductible contributions to a traditional IRA using form 8606. I had to go back to 2017 to find the most recent version of form 8606 in one of my returns. That appears to be the last time I made a non-deductible contribution to a traditional IRA. I thought TurboTax would keep track of those non-deductible contributions, but I no longer see form 8606 in my return. How can I find out if the TurboTax software is tracking my prior non-deductible contributions to traditional IRAs?

 

I took a Required Minimum Distribution (RMD) in December 2021 from a traditional IRA that I inherited after the prior owner’s death in mid-2019. Should all of that RMD from the inherited IRA be taxable income? Or should the non-deductible contributions to my own IRA accounts offset some of the taxable amount?  Does it matter if more than the required minimum amount was distributed from the IRA? Note: There is no tax deferred basis that came with the inherited IRA.

 

The only other distributions I have on 1099-R forms from 2021 relate to roll overs. I am more than a decade from taking RMDs from IRA accounts to which I have previously contributed.