Is possible to add a voucher number in the Expense voucher

Hello there, accounts3-spectr.

Currently, we can add the voucher number in the Ref no. field when creating an expense transaction. Aside from that, you can also enter it in the Memo field.

You can use this link for reference when creating an expense transaction: Enter, edit, or delete expenses in QuickBooks Online.

Feel free to get back to us if you need anything else. Have a great day!