How to add account types?

Adding account types:

Go to the Accounting tab on the left and Click “Income Accounts”.

Click on  “Add New” (Upper-Right).

Make sure to select an income account since that is what you're billing for. 

Provide a name for the account (mandatory), save under parent account, accoutn type number and a description (optional, but recommended).

Click Save and you’re all good to go.