When you need to reference old jobs to find pricing, quantity, or specifics for an order...
Follow steps accordingly:
1) Login to Quickbooks
2) Skip the "add number for verification" step and continue with login
3) Once logged in, click on SALES option, located on left hand side bar
4) Once in SALES tab click CUSTOMERS
5) In CUSTOMERS tab navigate to the search bar next to the "batch actions" drop down menu
6) Input customer name or company name associated with customer
7) Voila all names associated with your input will appear and you can search through these to find the information needed.
NOTE: "Invoices" have all order specs, quantity, and price. Use these for reference!