That's about all you need to know about towing the car, but now you need to check out the tow dolly you're using. Does it have a swivel platform or not? Without a swivel
, the car needs to have the front wheel's steering unlocked to allow for turning. If it has a swivel, steering should be locked. Check the manual for your dolly.
If using a dolly that requires unlocked steering, you'll have to determine if the car steering can be unlocked without turning on ignition. Some cars require a fuse to be pulled to tow with ignition on.