To edit a category, right-click a category name in the Category View, and choose Edit category.... A window appears with the same three tabs as the Create a new Category dialog: General, Hierarchy, and Tax. Each tab allows you to edit certain details of the category.

The General tab allows you to edit the name of the category, any notes you entered when you created the category, and the Last check number. The Type and Currency cannot be changed from their initial values.

The Hierarchy tab allows you to change the parent of the selected category by clicking another category which then becomes the parent. In addition, you can drag a category and drop it under its new parent.

The Tax tab allows you to assign or change VAT details, or to alter the automatic VAT assignment. It also allows you to toggle whether or not the category is included in tax related reports.