On March 25, the Department of Education announced a pause on debt collection against borrowers who are in default— including wage garnishment, reduction of tax refunds, and reduction of Social Security and Social Security disability benefits. Recent guidance states that the pause on debt collection applies only from March 13, 2020 to (now extended) September 30, 2021. If collections against you were being processed after March 13, 2020, you are eligible for a refund on that amount.
Find the official Department of Education guidance regarding all coronavirus relief efforts here. https://studentaid.gov/announcements-events/coronavirus