Honey, I'm Home
Uncommon28.2%ObjectiveOptionalAnywhere
Use quick travel to return to your headquarters
Your HQ is your starting garage. You can't just fast travel to the city its in - this has to be to the garage itself.
Do this from the Garage Management screen. When you select your starting garage/HQ there'll be some icons at the bottom - the right-hand one is to fast travel.
It'll cost some money to get there, but not more than 1500 or so - depending how far away you are when you do it.