Consumer Protection
Better Business Bureau: http://www.consumeraffairs.com

Federal Resources:
Internal Revenue Service: www.irs.gov
Treasury Inspector General for Tax Administration: http://www.ustreas.gov/tigta/
Congressional Budget Office: http://www.cbo.gov/

State Resources:
Alabama Department of Revenue: http://www.ador.state.al.us/
Alaska Department of Revenue: http://www.revenue.state.ak.us/
Arizona Department of Revenue: http://www.azdor.gov/
Arkansas Department of Finance & Administration: http://www.state.ar.us/dfa/
California Franchise Tax Board: http://www.ftb.ca.gov/
Colorado Department of Revenue: http://www.colorado.gov/revenue
Delaware Division of Revenue: http://revenue.delaware.gov/
Florida Department of Revenue: http://dor.myflorida.com/dor/
Georgia Department of Revenue: http://www.etax.dor.ga.gov/
Hawaii Department of Taxation: http://www.state.hi.us/tax/
Idaho State Tax Commission: http://www.tax.idaho.gov/
Illinois Department of Revenue: http://www.revenue.state.il.us/
Indiana Department of Revenue: http://www.in.gov/dor/index.htm
Iowa Department of Revenue: http://www.state.ia.us/tax/
Kansas Department of Revenue: http://www.ksrevenue.org/
Kentucky Department of Revenue: http://revenue.ky.gov/
Louisiana Department of Revenue: http://revenue.louisiana.gov/
Maine Revenue Services: http://www.state.me.us/revenue/
Maryland Comptroller: http://www.marylandtaxes.com/
Massachusetts Department of Revenue: http://www.mass.gov/
Michigan Department of Treasury: http://www.michigan.gov/treasury
Minnesota Department of Revenue: http://www.taxes.state.mn.us/
Mississippi State Tax Commission: http://www.mstc.state.ms.us/
Missouri Department of Revenue: http://dor.mo.gov/
Montana Department of Revenue: http://mt.gov/revenue/
Nebraska Department of Revenue: http://www.revenue.state.ne.us/
Nevada Department of Taxation: http://tax.state.nv.us/
New Hampshire Department of Revenue Administration: http://www.nh.gov/revenue/
New Jersey Division of Taxation: http://www.state.nj.us/treasury/taxation/
New Mexico Taxation and Revenue: http://www.tax.state.nm.us/
New York State Department of Taxation and Finance: http://www.tax.state.ny.us/
North Carolina Department of Revenue: http://www.dornc.com/
North Dakota Tax Department: http://www.nd.gov/tax/
Ohio Department of Taxation: http://tax.ohio.gov/
Oklahoma Tax Commission: http://www.oktax.state.ok.us/
Oregon Department of Revenue: http://www.oregon.gov/DOR/
Pennsylvania Department of Revenue: http://www.revenue.state.pa.us/
Rhode Island Division of Taxation: http://www.tax.state.ri.us/
South Carolina Department of Revenue: http://www.sctax.org/default.htm
South Dakota Department of Revenue and Regulation: http://www.state.sd.us/drr2/
Tennessee Department of Revenue: http://www.state.tn.us/revenue/
Texas Comptroller’s Office: http://www.window.state.tx.us/taxes/
Utah State Tax Commission: http://tax.utah.gov/
Vermont Department of Taxes: http://www.state.vt.us/tax/index.shtml
Virgina Department of Taxation: http://www.tax.virginia.gov/
Washington Department of Revenue: http://dor.wa.gov/Content/Home/Default.aspx
Wisconsin Department of Revenue: http://www.dor.state.wi.us/
Wyoming Department of Revenue: http://revenue.state.wy.us/

District Resources:
District of Colombia Office of Tax and Revenue: http://otr.cfo.dc.gov/otr/site/default.asp

Territory Resources:
U.S. Virgin Island Bureau of Internal Revenue: http://www.viirb.com/
Guam Department of Revenue and Taxation: https://www.guamtax.com/index.jsp