Depending on the country where your company is located, VAT or sales tax may be added when you upgrade your Slack workspace to a paid plan if a valid tax ID is not provided. If you forgot to add your tax ID, you can update your billing details to add one and may qualify for a tax refund.

Add a tax ID to your billing details

A Workspace Owner, or the member who upgraded the workspace, can follow the steps below to add a tax ID. Keep in mind that past invoices won't be updated, but your tax ID will show on all future invoices and your workspace will be automatically exempt for future purchases. 

Contact us to request a tax refund

Once your tax ID has been added, contact our team to request a refund: 

• Customers based in the U.S. can request an exemption following the steps outlined in the Sales tax and VAT article. 
• Customers outside the U.S. can contact our support team directly.