Taxation of tuition waivers (graduate student)

Hi!

My spouse was a graduate student during the fall term of 2024 at the same university where I work. He studied for free as a tuition waiver. However, my university needed to increase my income and take money for educational credits from my salary. As a result, my federal, state and FICA taxable income increased, and additional withholding against gross payroll wages was generated. I lost half of my 2-week salary because of this. Can I demonstrate it to the IRS and have this money back?

Any ideas?

Thanks!