Retirement tax questions

Thank you for the response. 

 

No, I didn't take deduction (it's non-qualified due to exceeding income limit, thus the backdoor Roth conversion). 

 

Can I claim the basis for 2019 to be $6000 in the 2020 tax form? This way, it correctly deducted off the $6000 for 2019 in 1099R.