To do this, please follow the instructions below:

- Step 1: Go to Settings -> Checkout

- Step 2: Make Company name Required on Form options

- Step 3: Back to Settings -> Store Language

- Step 4: Click on Change theme language

- Step 5: Go to Checkout & System tab

- Step 6: Scroll down to Company label, and rename it VAT number (or any number you wish to display), then save it

It should look like this on Checkout:

Step 7 (optional, only needed if you use Portrait or Landscape template): On our app, go to Translation -> Translate, and edit the Company field to be VAT Number:

After everything is finished, here is how the VAT is displayed on the invoice: