As we pointed out in a previous blog post, and in our Sales Tax Policies and Instructions, nonprofits must explicitly specify their exemption status. This is to ensure that nonprofit organizations are complying with state laws.
The reason for this reminder is that we have auto-enabled sales tax exemptions for all nonprofits in the first two weeks of wide enablement of our sales tax system. Effective Dec. 15, 2019, nonprofits must set this themselves.
Please see the blog on Nonprofit Exemptions for instructions on this.