You'll need to sign up for the apps that your accountant has, adyg11.
Before doing so, let's make sure that we've the list of your accountant's applications. Afterwards, you're good to sign up on the apps.
You can do this by clicking the Apps tab. Next, search for the application. Then, continue with the on-screen instructions to successfully get the app.
I've also added this article to know what you can do on a mobile app: Compare mobile app features.
I'm just around if you still need my help!