1. Cashflow360
  2. QuickBooks Online
  3. Troubleshoot

Quickbooks Online sync error: Invoice number is being used on another invoice

Why the sync error occurs

This sync error occurs when an invoice is syncing from Bill.com to QuickBooks Online, but the invoice number is already used by another Customer.

In Quickbooks Online, duplicate invoice numbers cannot exist for any customer.

How to fix the sync error

To resolve this error, in Quickbooks Online, disable the setting "Custom transaction numbers"

In Quickbooks Online:

  1. Select the QuickBooks Gear icon
  2. Under Your Company, select Account and Settings
  3. Select the Sales tab
  4. Select the Sales form content section.
  5. Select the Custom transaction numbers box.
  6. Select Save
  7. Select Done
  8. Sync again

ACCOUNT SETUP View all

GETTING PAID View all

CONNECTING WITH MY VENDOR View all

PAYABLES / HOW TO PAY View all

QuickBooks for Windows View all

QuickBooks Online View all

NetSuite/Intacct/Xero View all

Import/Export View all

Payables View all

Receivables View all

    Load more

    FAQ

    What a customer sees when charged for a payment Vendor not connected yet Managing Vendor payment methods Payment timing - Payables Check payments Charging a customer Updating a vendor's bank information Setting up and using the Network Applying vendor credits Processing Items from the Inbox

    Can’t find your answer?

    Live support available Monday - Friday, 5am-6pm PT

    My support history