Yes, you are entitled to one free credit report per year. My suggestion would be to go directly to the sources. Transunion, equifax and experian's web pages. Not all are easy to navigate. Also if you find any errors or discrepancies you are again entitled to a free report. The easiest two to deal with are equifax and transunion. Dealing with experian is frustrating to say the least.
If you do purchase your reports though, the costs is around $30. ( I recommend purchasing experians report through them, it is much easier to file a claim if you do)