Well no offence but what do you expect to get in response here?
You tell nothing about your setup. What Audiodevice are you using? what OS? What Cubase Version?
My quess is that you use a small mixconsole like the xenyx series of Behringer?
Im using the audio driver from the US-322/US-366. I guess the TASCAM has a built in Audio Driver. I’ve heard of a good one called Asio4All but don’t know how to install it into my program
Check to see if your audio interface has some sort of loop-back capability where the audio you send to it from Cubase can be routed back to the audio inputs.