Retirement tax questions

Thanks. Sorry some of the replies are bit difficult for me to understand since I am not well versed in tax stuff and certainly not with Roth related. 

 

What I meant is if all my traditional IRA is non tax deductible. Will I be able to convert all of that to Roth even if its over 6000, or am I still limited to the 6000 a year. So If lets say in 2021 and 2022 I contribute 6000 each to traditional IRA for total of 12k. In 2022 can I then convert all 12k to Roth? Or can I only convert 6000 per year so I would have to do it in multiple years if I want to convert it all