If you, in good faith, felt that you filed your returns correctly at the time, and you now find out that you filed them incorrectly, you are not under an obligation to file an amended return. The IRS has 6 years to audit a return when there is a 25% or greater omission of gross income.
Of course, you should file an amended return under the guidance of a competent CPA. That is your duty as a taxpayer. Filing now should allow you to claim reasonable cause and good faith to avoid a large penalty, which you may be unable to avoid if the IRS audits you between now and the end of the 6 year statute of limitations. However, you will not go to prison.
If you do not have the funds to pay the taxes you can work out a payment plan with the IRS. The IRS, despite all the crazy advertising on the radio, is actually quite a reasonable agency with which to deal, if you deal fairly with the IRS and come forward and try to do the right thing.
Answered on Jan 03rd, 2011 at 10:13 AM