Once you have signed in to your MTDVAT account, click on the hamburger menu in the top right corner of the app to add new client details. In the menu bar, select "Add New Client". This will add all client details to your account and save your action.

RoadMap on how to add new client on MTDVAT : Sign in to MTDVAT account -> Click on the hamburger menu of MTDVAT -> Click on the submenu "Add New Client" -> Enter all the details of the client and save your action.

Here's a video on how to add new client o MTDVAT: