An Internal Revenue Service supervisor in Washington says she was personally involved in scrutinizing some of the earliest applications from Tea Party groups seeking tax-exempt status, including some requests that languished for more than a year without action.

Holly Paz, who until recently was a top deputy in the division that handles applications for tax-exempt status, told congressional investigators she reviewed 20 to 30 applications. Her assertion contradicts initial claims by the agency that a small group of agents working in an office in Cincinnati were solely responsible for mishandling the applications.