--- title: "def Apply to Invoice Category" slug: "def-apply-to-invoice-category" updated: 2026-08-10T20:22:13Z published: 2026-08-10T20:22:13Z canonical: "help.idibilling.com/def-apply-to-invoice-category" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.idibilling.com/llms.txt > Use this file to discover all available pages before exploring further. # def Apply to Invoice Category To apply the adjustment to a specific invoice category select the applicable category from the corresponding drop-down list.