"The VAT tab is not appearing in the menu.

The VAT tab will be missing in your PDF if you haven't toggled this in the template you're using, Shehida. To fix this, let's go to the Custom Form Styles and adjust the settings in your template.

First, ensure you've already set up and used sales tax in QuickBooks Online. Once done, please follow the steps below on how to add VAT to your PDF:

1. Navigate to the Gear icon, then select Custom Form Styles.
2. Click Edit to modify your standard template, or choose New Style to create a new invoice template.
   
3. Hover to the Content tab, then select the Table section.
   
4. Locate Tax, then tick its box to add it to your PDF.
   
5. Click Done to save, or you can continue to modify your template.
6. If you've created a new template, click the arrow dropdown, then choose Make Default.
   

After making the changes, please generate a new invoice and print it to verify that the VAT details appear correctly in your PDF.

Additionally, if you're processing a payment from a customer, you can check out this article to learn how to record it: Record invoice payments in QuickBooks Online.

Should you need any more help with VAT settings or anything else in QuickBooks Online, feel free to reach out. The Community team is here to make sure everything works seamlessly for you, Shehida.