EXAMPLE: If you paid $2,000 in interest in a year and you can demonstrate that you received $5,000 salary in a year, you would be able to say to show on your form this information and they will tax you only for the $3,000 difference.
FOR YOU: You apparently earned no money in the tax-year, but paid $2,000 in interest the tax year. This will mean you are not taxed in 2018 for income. You will not get anything from it, but it's free, easy, and very important to show: When you fill out your form and I strongly encourage you to do so, first check that you're not a dependent already, then file showing that you made no money, but you paid interest on student loans.
The reason for filing, even though you won't receive anything is that you may be interested in buying a home or something and they'll ask for your last two tax filings, etc. and you will show you did due diligence.
Bonus: if by some miracle they decide to give us a bit of relief for our outrageous student loans you can show documentation that you did everything right and by the book.