By Bernie Becker - 10/10/12 07:38 PM EDT
By law, presidents nominate IRS commissioners for a single term lasting up to five years. The Senate must confirm a president’s appointee, and a commissioner’s term lasts until November of his or her final year in office.
Shulman has also fought against budget cuts to the IRS, arguing that cuts would be counterproductive and cost the country revenue, and tried to upgrade the agency’s technology.
And the commissioner has urged policymakers to offer taxpayers more predictability, and called for a simpler tax code. The IRS had to delay the 2010 filing season for some after Congress and President Obama agreed to a tax deal in December.
Treasury Secretary Timothy Geithner said Wednesday that Shulman's work on tax evasion and modernizing IRS technology "has helped make the nation's tax system more fair, efficient and effective."
"Commissioner Shulman is leaving the IRS a stronger institution - the mark of a true public servant - and his advice and expertise will be missed," Geithner said in a statement.
Steven Miller, a deputy IRS commissioner, will be the interim commissioner after Shulman steps down.
This post was updated at 5:25 p.m.