You want the $6000 to show up as basis for next year, as that way when you convert that $6000 (which happened in 2023, so the conversion will be on your 2023 tax return), you don’t have any taxes owed.

Since you made the contribution for 2022 in 2023, the paperwork is a tiny bit more complicated than had you contributed and converted in 2022. This is a good site that explains the whole process, this specific location talks about your current situation.

https://www.whitecoatinvestor.com/backdoor-roth-ira-tutorial/#late