If you're unable to locate the VAT, then I recommend reaching out to our QuickBooks Support Team. They have more tools to initiate a screen-sharing session and further help you with this.
You can follow these steps to contact them:
Go to the Help menu and click on Contact us.
Enter your concern in the What can we help you with? field and select Let's talk.
In the Choose a way to connect with us section, choose either Start messaging or Get a callback.