Can I input my own Invoice number?

Thank you for bringing your concern to our attention, @userchris-laycock. Let’s make sure that you can enter your own invoice number in QuickBooks Online (QBO).

Yes, you can enter your preferred invoice number when creating an invoice.

Let’s make sure that you turn on the Custom transaction numbers feature to set your own numbering preference.

To do so, here’s how:

1. Go to the Gear icon, then click Account and Settings.
2. Select the Sales tab, and then select anywhere within the Sales form content.
3. Turn on Custom transaction numbers.
4. Select "Save" and then "Done."
5. Open an invoice or any sales form, and in the Invoice No. field, enter the custom number or letter sequence you want to use for your forms. The sequence you set here applies to all sales forms.

 
Once done, let’s create an invoice again and enter your preferred invoice number.

You can check out this article on how to record invoice payments in QuickBooks Online.

If you need further assistance with managing your invoice, just comment down below. Have a great day!