IBR loan and interception

Can anyone tell me, if you are on an IBR plan for student loans, does your return automatically get intercepted? I have been unable to reach my loan servicer over the holiday and I honestly forget. This will be the first time in a while I will actually have a refund coming to me so I am not sure what happens. In comparison to my debt it isn't much, and I could use that money so desperately. But I don't know how this goes. I'm assuming they take it but really hoping they won't bc my kids are in desperate need of a few out of the normal budget items and this would help so much. Thanks for any help!