Retirement tax questions

Thank you for your response to my question. I think I simply need to ask if my annual non-deductable Roth contribution needs to be reported anywhere on any form. From various resources I was lead to believe it needed to be reported on form 8606. And that lead to the problem of how to determine my "total basis in trad IRAs"  from line 2 on 8606. A second question I also now have is: I had the understanding that 20 years ago after converting my trad IRA to a Roth IRA, non of my Roth funds would ever be taxable. Is this correct or no. Thanks