Fed Student Loans taking Fed Tax Returns

by Shannon
(Iowa)

For the last two years, fed loans have both garnished my wages and taken my fed tax return. To make this short, I want a paper (Physical written evidence) of how much they've taken on what dates, as well as what my ending balance is. This way, I can catch it should they continue to take the same amount repeatedly without crediting my owed balance. Who do I need to contact in order to receive this information?