If you are a non-profit organization claiming an exemption to being charged sales tax, send a valid tax exemption certificate to AR@15five.com. After review, 15Five will update the taxability status of your account in our billing system and update you accordingly.
Tax exemptions do not apply to past invoices, but will take effect for any future charges.
While we cannot provide you with the tax exemption certificate itself, here is a great resource for state-by-state exemption forms.
For more information regarding the taxability of SaaS in your state, check with your state and local officials and refer to this state-by-state sales-tax guide.