Turbotax non deductible IRA questions

I have a complex tax situation. I contributed non deductible to traditional IRA in 2021 and 2020. Then in both years i converted all of it to Roth IRA. The problem is, last year I forgot to include that in my filing.

 

This year I am using turbotax Premier. Some of the questions it asks me are very complex and Im not sure what to put

1 is did you make nondeductible contribution and track it. If i did backdoor roth, do I click yes?

 

Finding IRA basis. It says to look at 8606 but i forgot to file one last year.. so not sure what to put.

 

Enter value of traditional IRA. If i converted all to roth, I put zero?

 

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