Retirement tax questions

Ok.   Thank you.  I understand that I need to file a form 5329 for contributions made in 2018 and then 2018+2019 in 2019 and each year after until now.  I don't need to include the contributions from 2020 in a 2020 5329 because they were recharacherized.  

 

When I do amend 2020, I need to state I made a contribution to a traditional/non-deductible IRA and Turbo Tax will generate the 8606 form to document this.  In Turbo Tax is this triggered from an Income item or a Deduction item?  I ask because not knowing where this is triggered is what got me into all this in the first place.  Thank you for your help!!!