Recording problem

Hello, I’m trying to record Vocals in Audacity, but when I press record it Starts my recording in a new audio track (Which is what i want) but at the of the Previous Audio track, that being the track I want in the background to hear while I record my vocals. I’ve been trying for hours to figure this out and I just can’t, I’ve been through google. the preferences in audacity i even tried uninstalling and re-installing and in the hopes it might do something I restarted my computer but still nothing.

Any advice.

Look for a possible loopback-route via your audio interface,
where the output from the computer is mixed with your vocal & returned to the computer.