During a eld examination of GNTs income tax returns for 2012 and 2013, the revenue agent discovered

During a field examination of GNT’s income tax returns for 2012 and 2013, the revenue agent discovered that the treasurer had systematically omitted substantial income items and inflated deductions to minimize the corporation’s tax. The agent suspects that the treasurer adopted this deliberate course of action as early as 1998. Can the IRS initiate an audit of GNT’s tax returns all the way back to 1998? Explain briefly.