My country has a tax treaty with the U.S., so why was my paycheck taxed?

You'll need to complete the Sprintax Calculus profile and upload relevant forms, making sure to select the correct income type(s) (your country's tax treaty with the U.S. may not cover the relevant income type). Your Sprintax Calculus forms then have to be processed by the IPTC office, as treaty benefits are not granted automatically.