If you neglected to file your taxes you could be facing tax evasion penalties. This is why filing your taxes is so important. Late filing fees are worse then failure to pay fees, so file your taxes as soon as possible. Doing so will keep the big fees off your bill.
For more information on getting started if you failed to file taxes please read this article http://ez-online-tax-filing.com//what-to-do-when-you-have-not-filed-taxes-for-many-years.html