The steering is controlled by varying the speed of the drive motors through the H Bridge L298N.
There are many options in controlling the motors with the code.
the sample below shows a right turn. in this case the left motor is moving faster the the right steering the device to the right at probably a long arc. The code can be modified to just keep the left motor running and the right off, which would create a much sharper turn.
I have included a link to youtube showing the control of a device similar to what i have.
Maybe i should have put this on my OP.
thanks
if (mySwitch.getReceivedValue() == 4044388) { //turn right
digitalWrite(in1, HIGH);
digitalWrite(in2, LOW);
analogWrite(enA, 200);
digitalWrite(in3, HIGH);
digitalWrite(in4, LOW);
analogWrite(enB, 100);