It’s not uncommon that you’ll remeber the car but not the customer. There is a search option for that. Also, you may want to look for an invoice with a specific labor line in it. Now you can.
Using History (F4) will open up and be sure to click on the “Vehicle” tab.
You can use the “Word Search” to search for
Work Requested/Performed, Part Description, Notes, Invoice Ref# or Part Ref/Inv #.