Create a new contact by entering a phone number shown at (1).

You can use a person’s name, but if they would CLAIM TAXES, then you should opt to use their Company name (2) with their company PIN number (3).

On Saving (4), you’ll see the name selected with their PIN number.
Next time the same customer visits, you can select using the Contact dropdown on the top of the Transactions window or simply enter their phone number again.

Hint:  PIN's starting with "A" are personal PIN's and cannot be used to claim VAT. Therefore, there's no need to save them.