# Support tax amount tax overrides

Source: https://developer.avalara.com/ecommerce-integration-guide/transactions/certification-requirements/support-tax-amount-tax-overrides/

**Element type:** Suggested for Refunds

**Endpoints/models used:** [CreateTransaction](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Transactions/CreateTransaction/)

If your platform supports overriding a specific tax amount in a transaction, then this should also be supported in your AvaTax integration. You can accomplish this in the [CreateTransaction](https://developer.avalara.com/api-reference/avatax/rest/v2/methods/Transactions/CreateTransaction/) API by specifying a `taxOverride` of `taxAmount` in the [TaxOverrideModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TaxOverrideModel/).

The following example creates a sales invoice with an overridden tax amount.

[![Closed](https://avalara-devdocs-prod.mcoutput.com/avatax-for-ecom/Content/Skins/Default/Stylesheets/Images/transparent.gif)Example](javascript:void\(0\);)

```
 {  "lines": [    {      "number":"1",      "quantity":1,      "amount":100,      "taxCode":"P0000000",      "itemCode":"Test SKU",      "description":"Test Item Description"    }  ],  "taxOverride":{    "type": "TaxAmount",    "taxAmount":"6.25",    "reason": "Pre-calculated tax"  },  "addresses": {    "singleLocation":{      "line1":"100 Ravine Ln NE",      "city":"Bainbridge Island",      "region":"WA",      "country":"US",      "postalCode":"98110-2687"    }  },   "type":"SalesInvoice",  "companyCode":"DEFAULT",  "date":"2024-07-12",  "customerCode":"Test Customer ID",  "commit":true,  "currencyCode":"USD"} 
```