How to add my company address on invoice template

I can help you with adding the company address and vat number on the invoice template, @noora-almoayyed. 

You can go to the Content tab from the Custom Form Styles to add the address on the invoices and VAT number. 

Follow the steps below:

1. Go to the Gear icon (⚙) and click on Custom form styles.
2. Select your invoice template. 
3. On the page that appears, click on Content tab and select the Header section. 
4. Click the check box next to Business address and VAT No. 
5. You can click on the Preview PDF button to check all the information you entered. 
6. Click on Done. 

For detailed guidance about editing your invoice template, check out this article: Customise invoices, estimates, and sales receipts in QuickBooks Online.

From here, you can now create and send them an invoice with your company address and VAT number. 

Let me know if you need further help with creating an invoice with the company address and VAT number. Keep safe, and have a wonderful day!