I contributed and then preformed 2019 Backdoor Roth IRA in Jan 2020. How to report Backdoor Roth IRA for 2019?

I performed 2019 backdoor Roth IRA ($6000) in Jan, 2020. However, my broker did not give 1099-R this year but said it will be ready this time next year. I have questions for the following:

1. how to report Backdoor Roth IRA in tax return 2019?

2. I plan to convert another $6000 in 2020 backdoor Roth IRA, is any I should be aware in tax return 2020?

Thanks a lot!