You can enter your suppliers or import a list of all of your suppliers by clicking on the 'Suppliers' page on the menu on the left-hand side. Although you cannot assign a specific category to an individual supplier, the more you categorise your expenses to your various suppliers, the quicker the system will learn from the way you categorise your expenses. This will save time in the future as the Assistant will eventually automate up to 90% of your accounting for you.