Hi sushanbox-gmail!
If you are using TurboTax Online you can do the following:
1. On the navigation on the left side click RRSP -> RRSP Contributions to be carried forward
2. On that screen you should see the following text "RRSP/PRPP contributions you are deducting for 2022". You can enter the 6k amount on that line. I've included a screenshot as well.
Hopefully that helps!