What changes when a shop opens a second location
Separate calendars, stock, and invoices per location, and what can still be shared without mixing the day.
Two counters, two days
A second location is not a copy of the same calendar. Each site has its own bookings, bays, and people. If both write in one diary, an hour reserved in one place collides with the other.
A customer can be shared if they really use both sites. The vehicle and its history travel with them. The booking and today's order do not. They happen in one place.
Stock does not add up
A part in the other building is not in your hand. Inventory is per location. So is the low-stock notice. Otherwise the shop promises a number that includes what it cannot fit today.
Transfers have to be visible: who asked, where it left, and whether it arrived. Without that, each site thinks the other has the part, and the car waits.
Invoice where the work happened
The invoice comes from the location that did the job. Mixing series and unpaid bills from two sites makes the close harder. Each one has its own payment status.
An owner can still look at both. The counter at each site works with its own. The person taking payment should see that site's invoices, not the other site's.
Before you open the door
Set up the location, its calendar, and a minimum stock of the basics before the first car. Opening and sorting it out later leaves week one on paper.
Name someone at each site to close the day: open orders, tomorrow's first bookings, and parts on order. Two sites without that close drift apart even on the same software.