To set or change an expense category:

1. Open the expense in edit mode
2. Find the "Category" dropdown
3. Select one of the six standard categories: Algemene kosten, Kantoorkosten, Autokosten & reizen, Telefoon & internet, Representatiekosten, or Inkoop & materiaal
4. Save the expense

The six standard categories follow the Dutch tax return, so your bookkeeping lines up with your aangifte. You can also add your own categories via the settings gear on the Expenses page. Use categories consistently so filters, lists, and reports stay easy to review.