---
title: "How to Adjust Tax to an Exported Invoice"
slug: "how-to-adjust-tax-to-an-exported-invoice"
updated: 2026-03-27T01:42:48Z
published: 2026-03-27T01:42:48Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.servicetitan.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Adjust Tax to an Exported Invoice

## Problem

You need to charge or remove tax but the invoice was already exported so you're unable to include or remove the tax to the total.

## Solution

1. [Search](/v1/docs/use-search-in-servicetitan) for the invoice for which you want to add or remove tax.
2. In the invoice screen, select **Add an adjustment invoice**.
3. In the adjustment invoice screen, select **Add a task**.
4. In the *Add a Task* screen, add the same task from the original invoice but in negative quantity. For example, if the original task has a quantity of *1*, enter *"-1."*
5. When finished, click **Save**. The balance on the original invoice should be clear.
6. In the invoice screen, select **Add an adjustment invoice** to create a second adjustment invoice.
7. In the new adjustment invoice, add the same task from the original invoice.
8. Depending on whether you want to add or remove tax:
  1. Select the **Taxable** option if you want to add tax.
  2. Clear the **Taxable** option if you want to remove tax.

> [!NOTE]
> **Note:** Account configuration may be required. If you do not see the **Taxable** option, contact [Technical Support](http://go.servicetitan.com/ask) to enable this feature.
9. When finished, click **Save**.
10. Check the total in the adjustment invoice to make sure the total includes the tax.
11. When finished, click **Save**.
12. Check the total amount to make sure the tax is included.