In your database management tool, probably phpMyAdmin type in the SQL box:

Invoice Number: ALTER TABLE invoices AUTO_INCREMENT = 1234;

Pcid Number: ALTER TABLE pc_owner AUTO_INCREMENT = 1234;

Receipt Number: ALTER TABLE receipts AUTO_INCREMENT = 1234;

PC Work Order Number: ALTER TABLE pc_wo AUTO_INCREMENT = 1234;

Where 1234 is the number you want to start with.

Posted in: Installation FAQ