The steering on the radio(transmitter) is not working but when I use the trim on the radio the wheels trim.I am taking a guess thinking its most likely the radio steering nob but am not 100% sure. I am new to RC cars and was wondering what to do in order to make sure its the steering nob on the radio or if its a problem in the servo/receiver?

Sounds like D/R trim on radio is set to high...try dialing it back down