The International Payee Tax Compliance (IPTC) group (formerly Nonresident Alien Tax Compliance, NRA) is transitioning from the Glacier tax determination system to Sprintax Calculus on January 16, 2024. The Sprintax Calculus webpage will launch on January 16, 2024. This page will include an outline of required documents, Sprintax Calculus Quick Start Guide, FAQs, and more. The IPTC website will also be updated to include additional customer service offerings under Contact Us. For questions, please reach out to Eric Dorman (eric_dorman@harvard.edu) and Maryanne Donahue (maryanne_donahue@harvard.edu).