<prompt> Human: Im moved back in with my parents in 2005. I believe that that last time I filed taxes was in 2004. I havent had an income since 2003. Id like to begin working and building credit and was wondering if I needed to file back taxes for those years despite not earning a wage.  <response>: No, you do not need to file taxes if you didnt have income. Thats assuming you didnt have income from other sources, such as investments. 