To ensure your VAT number and VAT registration number appear the same on your invoices, we need to make sure they are entered identically, Shan.

You can change your VAT registration number in your VAT settings.

Here's how:

1. In the left panel, click VAT.
2. Select the Edit VAT dropdown, and click Edit settings.
3. Choose the beginning month of your current VAT period.
4. Choose your filing frequency. Then, your Reporting method.
5. Enter your VAT Registration No. the same as your VAT number.
6. Hit Save.

Afterward, create a sample invoice to confirm the VAT number displays the correct information accurately.

You might also find this article helpful if you want to automatically track your sales tax in QBO: How do I set up sales VAT rates and use them on forms?

Don't hesitate to keep us posted if you still need further assistance.