Prepare Documentation: Obtain an official IRS letter confirming your organization's tax-exempt status under the appropriate section of the tax code. DreamHost Help
Sign Up: Fill out and submit the DreamHost Nonprofit Discount form to sign up for service.
Add Domain: Add your organization's domain as Fully Hosted.
Provide Billing Information: Enter a credit card billing address. This information is used for verification purposes only; your card will not be charged.
Submit Documentation: Submit a support ticket and attach proof of your tax-exempt status.