How to create my own invoice number?

GO to the Company Gear (upper right hand corner)

• Select “Company Setting” under Settings
• Select “Sales” under Settings  (or “Sales Form Entry” under Preferences)
• Check-box “Custom transaction number” (see attached screenshot below for reference)
• SAVE

GO back to create new Invoice

• Click “+” plus sign
• Select “Invoice” under Customers
• Enter new “Invoice no.” (located at top right corner)

Click on the screenshots below to enlarge them

#QuickBooks Online