I used
https://www.freecreditreport.com (not really free). I recommend this or any other credit report site where you can get a 3 for 1 report of the big 3, Experian, Trans Union and Equifax. You should get all 3 reports because they vary, sometimes dramatically.
I also like the feature of alerts they have any time my FICO score changes/updates or if there are any inquiries or new credit items on my record.