https://blog.ed.gov/2017/07/3-ways-to-get-out-of-student-loan-default/See if you each qualify for loan rehabilitation. Without knowing more about your situation, this is probably your quickest way out of the fire and back into the frying pan. From there, you can work on income-based repayment plans to make the debt manageable and keep the IRS out of it.
As to your original question. YES. The IRS can and will keep every penny of your tax refunds until the student loan debt is either paid, or back in good standing.