The University of Oklahoma Health Campus uses Sprintax Calculus as its official tax compliance system for international employees and certain vendors. Sprintax Calculus is a secure, online platform which allows the University to maintain accurate immigration and tax residency records, determine eligibility for income tax treaty benefits, ensure federal compliance with IRS nonresident alien tax regulations, provide employees with access to online accounts and tax forms, and streamline the overall onboarding and tax-withholding process for international workers. Once an employee’s new hire information has been received by Payroll Tax Team:

1. The Payroll Services Tax Team creates an account for the Employee in Sprintax Calculus

2. An email invitation is sent to the employee with instructions to activate the account. 3. The employee will receive an email from Sprintax noreply@sprintax.com with a link to http://calculus.sprintax.com/

3. The employee logs in, completes their profile, and submits all required information and supporting documentation.

4. The Payroll Services Tax Team uses Sprintax Calculus outputs to determine:

o Tax residency status

o FICA withholding eligibility

o Tax treaty qualification (if applicable)

o Appropriate payroll tax forms, including Form W‑4, Form W‑8BEN, Form 8233, and treaty-related documentation, as applicable.

Sprintax Calculus provides a transparent, efficient, and compliant process for managing international employee tax records. Employees are responsible for keeping their information current and should promptly update Sprintax Calculus whenever there is a change to their immigration status, visa classification, U.S. address, employment information, or other relevant tax-related information.

Please take a few minutes to review the Employee Sprintax Calculus Guide, which provides step-by-step instructions for completing and maintaining your account.

Important: Employees cannot update their Social Security Number or legal name in Sprintax Calculus. If either of these items needs to be updated, please contact HSC-Tax@ouhsc.edu.

Access the Sprintax Calculus Guide Here.

Here are additional resources provided by Sprintax to aid with activation and/or additional questions: 

· Sprintax Calculus Knowledge Base

· Sprintax General Questions 

· Sprintax 2FA Instructions

For questions regarding completion of the Sprintax Calculus questionnaire or for technical assistance, contact Sprintax Support through the live chat feature within Sprintax Calculus or by email at calculussupport@sprintax.com.

For questions regarding tax residency status, tax treaty eligibility, payroll tax withholding, or other University tax-related matters, please contact HSC-Tax@ouhsc.edu.