> For the complete documentation index, see [llms.txt](https://docs.digitalriver.com/salesforce-lightning/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.digitalriver.com/salesforce-lightning/salesforce-lightning-b2b-commerce-api-1.0.1/appendix/enable-or-disable-us-tax-certificates.md).

# Enable or disable US tax certificates

Learn how to enable or disable US tax certificates.

In the Salesforce Lightning app, you can enable or disable US tax certificates. 

1. To enable or disable US Tax Certificates on the **My Account** page, add or remove the **Tax Certificates** menu item. 
2. To enable or disable US Tax Certificates on the **Checkout process/flow**, adjust the **DR Shipping Address** for the `drb2b_BuyerInfo` component and configure it to include (or not include) US Tax Certificates as part of the flow.

## Main flow and subflow details

| Flow type | Description                                                                                                                                                                                          |
| --------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Main flow | DR checkout flow                                                                                                                                                                                     |
| Subflow   | <p>DR Shipping Address Custom component: <code>drb2b\_BuyerInfo</code><br>Design variable: Enable Tax Certificates<br>Design variable values: {!$GlobalConstant.True} / {!$GlobalConstant.False}</p> |

## Enable tax certificates in the subflow

If the design variable's value is `!$GlobalConstant.True`, the tax certificates' functionality in the checkout flow will be enabled.

<div align="left"><img src="https://3825059470-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FE4mQlr6JaI21hIMVilNW%2Fuploads%2FPTPHedj368LC354Icmnq%2FEnable%20tax%20certificate%20in%20subflow.png?alt=media&amp;token=a41a0891-305a-4f91-b694-a4303a885c7c" alt=""></div>

## Disable tax certificates in the subflow

If the design variable's value is `!$GlobalConstant.false`,  the tax certificates' functionality in the checkout flow will be disabled.

<div align="left"><img src="https://3825059470-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FE4mQlr6JaI21hIMVilNW%2Fuploads%2FIdf5lquIiEX8khblA92M%2FDisable%20tax%20certificate%20in%20subflow.png?alt=media&amp;token=6ed10c69-f02c-4ed4-b173-453e545a0eee" alt=""></div>

Once the design variable is configured, save and activate the checkout flow.