How to enter a Backdoor Roth conversion in 2020 for 2019 taxes

I converted $5500 in 2019 and received that info in a 1099-R.  I discovered the limit went up to $6000.  I also found more money and wanted to put $6000 in for my wife.  My wife and I both have $0 in our Traditional IRAs because I have previously done the Backdoor Roth for both of us.  So I'm wondering if I put $500 more into my Traditional and convert to a Roth, plus $6000 into my wife's Traditional and convert to Roth, all for the 2019 tax year (but money actually moved in 2020), how do I enter that into TurboTax since I will not receive a 1099-R for the transactions in the 2020 calendar year (2019 tax year)?