Why is there a sales tax on my checkout page?
The event or club you are signing up for collects tax according to state rules. Different jurisdictions have different tax rules that apply different rates depending on location, nonprofit status, race fees, ticket fees, add-on purchases and processing fees.
I only made a donation. Why is there sales tax?
While the donation is free to the nonprofit, the processing fee is paid to RunSignup or GiveSignup. In certain states we are required by law to collect sales tax on behalf of the state.