The University of Colorado's employment verification vendor, The Work Number, is currently experiencing a service disruption. Employee Services is working with this vendor to resolve this issue and will update this webpage once service is restored. In the interim, please reach out to your campus for verification requests:
State W-4 Forms
The University of Colorado withholds state taxes from the state in which you perform work. All out-of-state employees must fill out a W-4 for the state in which they work and mail or fax it to Employee Services. (Email is not a secure method to deliver the personal information contained on the W-4).
- Pennsylvania residents: There are two forms to fill out for your state.
- Alaska, Florida, New Hampshire, Nevada, South Dakota, Tennessee, Texas, Washington and Wyoming do not collect state income taxes.
University of Colorado
1800 Grant St., Suite 400
Denver, CO 80203
Last updated: 2020