What is the reason I can not shoot continuous shots on my nikon d90 for action shots? It only allows me to shoot one frame. I am using a Tamron 200-500 lens.
Most likely, your drive mode is wrong. If you are in Nikon's version of easy automatic focus, it likely locks down settings like drive mode so that they aren't even an option. Even if you are in the creative auto mode, you still need to select continuous drive to be able to shoot continuously. If you have single shot drive selected, then you will only be able to take one shot at a time.