Company ID[removed] Sales Invoice template do not have page numbering but CompanyID[removed] managed to have Page numbering on every page.

Welcome to the QuickBooks family, @ctan2830.

I can help you show the page numbering in QuickBooks Online.

The information that shows on an invoice will depend on the template you choose. To include page numbering, you'll need to select the Airy new format.

Here's how:

1. Click the Gear icon in the upper-right corner.
2. Select Custom form styles.
3. Search for the invoice template and press Edit.
4. Go to the Design tab, then choose Change up the template. 
5. Select Airy new. 
6. Make the necessary changes to the content.
7. Click Done.

Additionally, I recommend the following resources for you to learn more about how to customise templates, including the invoice emails:

• Customise invoices, estimates, and sales receipts in QuickBooks Online
• Customise your invoice emails

I'm only a few clicks away if you have any other questions. Wishing you and your business continued success.