# Add TaxJar to Campaigns

*Click* on **CRM > Campaigns >** *Click* on the blue **Edit** button next to the Campaign you want to add TaxJar to.

* TaxJar can be added to an entire campaign or to individual campaign products.
  * It is recommended to add TaxJar to the campaign. Go to **General Details**. Look for Tax Service under **Billing Options**. *Click* the drop down and select a **TaxJar** service. Then Click on the blue **Update** button.
  * To add TaxJar to individual campaign products, go to **Offers** or **Upsells**. Look for Tax Service under **General Options**. *Click* the drop down and select a **TaxJar** service. Then Click on the blue **Update Product** button. A tax service on the product will override the campaign service. Different services on products and campaigns will cause multiple calls to TaxJar on a single order, if needed.
* On the campaign go to **General Details** and check the box next to “Auto Tax Calculation” if you want it to automatically calculate the sales tax and then click the blue **Update** button.

Auto Tax Calculation will automatically determine the sales tax rates on the checkout page. This works for form-code checkout pages and Order Entry.\
\
The Auto Tax Calculation option does not have any affect on Direct API checkout pages. To calculate tax on the checkout page for Direct API checkout pages, call Konnektive’s [Order Sales Tax API](https://apidocs.konnektive.com/?version=latest#64fd1132-fd0e-4dd9-b985-6cd6f1ecdae9) before submitting the checkout page (shipping address must be acquired from the customer).

If you do not use Auto Tax Calculation and do not call the Order Sales Tax API, then the tax will calculate upon the order submission.

When passing the data to Konnektive’s API, please be sure to use Alpha-2 ISO country codes, as found in our [API documentation](https://apidocs.konnektive.com/?version=latest#e7153cc7-cce9-4642-8ce4-f79be2a5cf83).


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