Go to the WhatsApp client page on the menu bar and click on the
CREATE NEW CLIENT tab, as shown in the figure.
After that, you must choose between Light plan or Full plan. Pay attention to the features of each plan and choose the one that best suits your needs.
Choose for how long to activate the new client. You can check the price with the price calculator and you'll see the expiry date within which the client will be active. Then click on the button
CREATE and that's it. You have create you new client and you can pair the phone number.