On May 10, the IRS apologized for targeting conservative organizations for extra scrutiny on tax exemption applications, validating a longstanding claim of conservatives, setting off new reports of additional targeting and leaked confidential information and leading to the resignation of the Acting IRS Commissioner.

In the initial apology, given by Lois Lerner, who heads the IRS division that oversees tax-exempt groups, Lerner said IRS agents singled out groups with words like "tea party" or "patriot" in their tax exemption applications. The practice, she said, occurred in 2012 and was initiated by low-level workers in Cincinnati.

However, additional information indicates that the IRS began targeting conservative groups in 2010 and that senior IRS officials in Washington knew of the practice, ABC and The Washington Post reported.

Although Lerner said about 300 groups were originally targeted, news reports suggest that 500 may be a better estimate. According to a timeline of IRS actions released by ABC News, the criteria for targeting changed multiple times, from things like tea party groups to things like "political action type organizations involved in limiting/expanding government, educating on the constitution and bill of rights, social economic reform/movement."

The Inspector General report, released Thursday, indicated that after the Champaign Tea Party's tax-exempt status was approved in February 2012, no other tea party group applications were cleared for 27 months, USA Today reported. At the same time, the paper said, "groups with liberal-sounding names had their applications approved in as little as nine months."

Here are some of the questions that the IRS sent to groups seeking non-profit status.

IRS questions
Associated Press

"Provide a list of all issues that are important to your organization. Indicate your position regarding each issue."

- IRS documents collected by ABC News

>> White House press secretary Jay Carney, rear, is seen on a television monitor during his daily news briefing at the White House in Washington, Tuesday, May, 14, 2013. Carney touched on various topics including the Justice Department's secretly obtaining two months of telephone records of reporters and editors for The Associated Press and IRS.

IRS questions
Associated Press

"Please explain in detail the derivation of your organization's name."

- IRS documents collected by ABC News

>> In this May 14, 2013 photo, Tom Zawistowki, founder of the nonprofit Ohio Liberty Coalition, one of the region’s largest groups affiliated with the national tea party movement, poses with a binder of documents he gave to the IRS, in Kent, Ohio. For years, Ohio Liberty Coalition would raise thousands of dollars to bus activists to rallies, run phone banks, rent a tent at a local fair, and knock on roughly 40,000 doors across Ohio to challenge the president and his fellow Democrats in the 2012 elections. All the while, the organization was locked in a battle with the nation’s tax enforcement agency over whether it should be granted tax-exempt status.

IRS questions
Stuart Johnson, Deseret News

"Are you on Facebook or other social networking sites? If yes, provide copies of these pages."

- IRS documents collected by ABC News

>> Hundreds of people gather at the Federal Building Plaza in Salt Lake City for a tea party protest on government spending, bailouts, big government and more, Wednesday, April 15, 2009.

IRS questions
Associated Press

"Provide details regarding your relationship with Justin Binik-Thomas."

- IRS documents collected by ABC News

In March 2012, Binik-Thomas, a founding member and past leader of the Cincinnati Tea Party, highlighted this question in an op-ed piece at The Washington Examiner.

"A caseworker assigned to me by my congresswoman said that I am the first individual she has seen listed in an IRS query during her decades-long career," Binik-Thomas wrote. "Am I so successful in my roles so as to be a threat to his administration? Am I so well known to be a valuable target? Or am I a pawn in a witch-hunt in pursuit of another group or individual? How high does this go? Perhaps it is time for Congress to ask some pointed questions of the IRS."

>> In this April 1, 2010 file photo, a participant in the Tea Party rally holds a sign in Omaha, Neb.

IRS questions
Associated Press

"Provide details regarding all training you have provided or will provide. Indicate who has received or will received the training and submit copies of the training material."

- Document from Linchpins of Liberty in Franklin, Tenn.

>> President Barack Obama speaks on the Internal Revenue Service's targeting of conservative groups for extra tax scrutiny in the East Room of the White House in Washington, Wednesday May 15, 2013. Obama announced the resignation of Acting IRS Commissioner Steven Miller, the top official at the IRS.

IRS questions
Associated Press

"Have you attempted or will you attempt to influence the outcome of specific legislation? If so, provide the following:

a. Provide copies of all communications, pamphlets, advertisements, and other materials distributed by the organization regarding the legislation

b. Provide copies of any radio, television, or Internet advertisements relating to your lobbying activities

c. Please indicate the percentage of time and resources you have spent or will spend conducting these activities in relation to 100 percent of all your activities"

- Document released by the American Center for Law & Justice

>> White House press secretary Jay Carney speaks during his daily news briefing at the White House in Washington, Wednesday, May 15, 2013.

IRS questions
Associated Press

"Do your issue-related advocacy communications compare to the positions of candidates or slates of candidate on these issues with your positions? Provide copies of these communications. What percentage do these constitute of your issue-related advocacy communications?"

- IRS documents collected by ABC News

>> James Johnson of Delray Beach, Fla., left, and Jim Davis of Provo, Utah, attend the "Restoring Honor" rally, organized by Glenn Beck, at the Lincoln Memorial in Washington, on Saturday, Aug. 28, 2010.

IRS questions
Laura Seitz, Deseret News

"Please provide copies of all your current web pages, including your blog posts. Please provide copies of all of your newsletters, bulletins, flyers, newsletters or any other media or literature you have disseminated to your members or others. Please provide copies of stories and articles that have been published about you."

- IRS documents collected by ABC News

>> Tea party and 9/12 supporters rally in Salt Lake City at the Utah State Capitol on Thursday, April 15, 2010.

IRS questions
Associated Press

"Please provide the following information for your board of directors and officers:

a. Provide all copies of your corporate minutes from inception to the present

b. Provide the titles, duties, work hours and compensation amounts of your board members, officers and employees. If they only work for a certain time yearly, bi-yearly or quad-yearly, please provide the periods they had (have) worked and will work. Please identify your volunteers

c. If you have a board member or officer who has run or will run for a public office in the near future, please describe fully. If none, please confirm by answering "none" to this question."

- Document released by the American Center for Law & Justice

>> Attorney General Eric Holder pauses during a news conference at the Justice Department in Washington, Tuesday, May 14, 2013. Holder said he's ordered a Justice Department investigation into the Internal Revenue Service's targeting of conservative groups for extra tax scrutiny.

IRS questions
Associated Press

"Provide the following information for the income you received and raised for the years from inception to the present. Also, provide the same information for the income you expect to receive and raise for 2012, 2013, and 2014.

a. Donations, contributions and grant income for each year which includes the following information:

b. The names of the donors, contributors and grants. If the donor, contributor or grantor has run or will run for public office, identify the office. If not, please confirm by answering this question "no."

c. The amounts of each of the donations, contributions and grants and the dates you receive them.

d. How did you use these donations, contributions and grants. Provide the details"

- Document released by the American Center for Law & Justice

>> President Barack Obama gestures during a news conference with British Prime Minister David Cameron, in the East Room of the White House, with subjects ranging from Syria's civil war to the IRS, in Washington, Monday, May 13, 2013.

IRS questions
Associated Press

"Do you directly or indirectly communicate with members of legislative bodies? If so, provide copies of the written communications and contents of other forms of communications. Please include the percentage of time and resources you have spent or will spend conducting these activities in relation to 100 percent of all your activities."

- Document released by the American Center for Law & Justice

>> White House press secretary Jay Carney listens to a question during his daily news briefing at the White House in Washington, Wednesday, May 15, 2013.

IRS questions
Associated Press

"Fully describe your youth outreach program with the local school."

- IRS documents collected by ABC News

>>Tim Savaglio, a member of the Liberty Township Tea Party, displays one of the letters his group received from the Internal Revenue Service, Wednesday, May 15, 2013, at his home in West Chester, Ohio.

IRS questions
Associated Press

"Submit the following information relating to your past and present directors, officers and key employees:

a. Provide a resume for each

b. Indicate the number of hours per month each individual has provided or is providing services to you

c. Provide a description of all the services each individual provides or has provided to you

d. Indicate the total compensation provided to each individual

e. Describe how each compensation package was determined

f. Indicate if any of your current and former officers, directors and key employees are related to each other (include family and business relationships) and describe the nature of the relationship."

- Document released by the American Center for Law & Justice

>> Tea party protesters gather at Freedom Plaza in Washington, Thursday, April 15, 2010.

IRS questions
Associated Press

"List each past or present board member, officer, key employee and members of their families:

a. Has served on the board of another organization

b. Was, is or plans to be a candidate for public office. Indicate the nature of each candidacy

c. Has previously conducted similar activities for another entity

d. Has previously submitted an application for tax exempt status"

- Document from Linchpins of Liberty in Franklin, Tenn.

>> President Barack Obama speaks on the Internal Revenue Service's targeting of conservative groups for extra tax scrutiny in the East Room of the White House in Washington, Wednesday May 15, 2013. Obama announced the resignation of Acting IRS Commissioner Steven Miller, the top official at the IRS.

IRS questions
Associated Press

"Do you encourage eligible voters to educate themselves, register to vote, and vote?

a. Explain in detail how you do this. For example, do you conduct voter registration or get out the vote drives, or voter education?

b. In the course of conducting these activities, do your members or volunteers urge the votes to support or oppose particular candidates or slates of candidates? If not, describe how you ensure that these activities are conducted in a strictly non-partisan manner"

- Document released by the American Center for Law & Justice

>> In this photo taken March 27, 2010, William Temple attends a Tea Party rally in the desert outside Searchlight, Nev.

IRS questions
Associated Press

"Do you or will you endorse candidates? If yes, explain and answer the following:

a. Provide your endorsement criteria

b. Once a candidate is endorsed, how does your organization handle the endorsement?

c. Provide a list of all candidates you have endorsed.

d. Does your organization notify the candidate of the endorsement? If yes, explain.

e. Do you provide any materials to candidates, which they may use to promote their candidacy? If so, please describe and provide copies of those materials"

- Document from Linchpins of Liberty in Franklin, Tenn.

>> Reporters raise their hands as White House press secretary Jay Carney takes questions during his daily news briefing at the White House in Washington, Tuesday, May, 14, 2013. Carney touched on various topics including the Justice Department's secretly obtaining two months of telephone records of reporters and editors for The Associated Press and IRS.

IRS questions
Associated Press

"Apart from your responses to the preceding, estimate the percentage of your time and what percentage of your resources you would devote to activities in the 2012 election cycle in which you will explicitly or implicitly support or oppose a candidate, candidates, or slate of candidates, for public office."

- IRS documents collected by ABC News

>> The John Weld Peck Federal Building, shown Tuesday, May 14, 2013, in Cincinnati, houses the main offices for the Internal Revenue Service in the city. The IRS apologized Friday for what it acknowledged was "inappropriate" targeting of conservative political groups during the 2012 election to see whether they were violating their tax-exempt status. In some cases, the IRS acknowledged, agents inappropriately asked for lists of donors. The agency blamed low-level employees in a Cincinnati office, saying no high-level officials were aware

IRS questions
Associated Press

"Provide a copy of the presentation (To Challenge the Imagination of the Rising Generation) given to Vanderbilt College Republicans by your director"

- Document from Linchpins of Liberty in Franklin, Tenn.

>> With the Capitol in the background, former House Majority Leader Dick Armey addresses a Tea Party rally at Freedom Plaza in Washington, Thursday, April 15, 2010.

IRS questions
Associated Press

"The names of the donors, contributors, and grantors . . . The amounts of each donations, contributions, and grants and the dates you received them."

- IRS documents collected by ABC News

>> In this Aug. 2, 2012 file photo, Internal Revenue Service (IRS) Commissioner Douglas Shulman testifies on Capitol Hill in Washington, before the House Oversight Committee. The Internal Revenue Service inappropriately flagged conservative political groups for additional reviews during the 2012 election to see if they were violating their tax-exempt status, a top IRS official said Friday.

IRS questions
Associated Press

"Has any person or organization provided educational services to you? If yes, provide the following:

a. The name of the person or organization

b. A full description of the services provided

c. The political affiliation of the person or organization."

- Document from Linchpins of Liberty in Franklin, Tenn.

>> Gov. Scott Walker says the IRS's targeting of conservative groups for extra scrutiny is a real threat to our freedoms, on Tuesday, May 14, 2013, in Madison, Wis.