Resources

Useful Resources:

Federal

• Internal Revenue Service – irs.gov
• Federal Refund Status – https://www.irs.gov/refunds
• IRS Payment Options – https://www.irs.gov/payments
• IRS Income Tax Treaties (A-Z) – Texts of U.S. tax treaties by country – https://www.irs.gov/businesses/international-businesses/united-states-income-tax-treaties-a-to-z
• Internal Revenue Bulletin (IRS) – Weekly official IRS rulings & guidance https://www.irs.gov/irb
• Taxpayer Advocate Service (Independent IRS Office) – https://www.taxpayeradvocate.irs.gov
• TaxTopics.net – Tax Resources Gateway – A broad collection of tax topics sorted by subject
• Library of Congress – Federal Tax Law Guide – Tax forms, publications, and research tips – https://guides.loc.gov
• Georgetown Law Library – Federal Tax Research Guide – Legal research sources – https://guides.ll.georgetown.edu/federal_tax
• Vanderbilt University – Tax Law Research Guide – https://researchguides.library.vanderbilt.edu/taxlawresearch

US States

• U.S. States With Income Tax Filing Requirements (With Official Websites)
  Alabama – https://revenue.alabama.gov/
  Arizona – https://azdor.gov/
  Arkansas – https://www.dfa.arkansas.gov/
  California – https://www.ftb.ca.gov/ (Franchise Tax Board)
  Colorado – https://tax.colorado.gov/
  Connecticut – https://portal.ct.gov/drs
  Delaware – https://revenue.delaware.gov/
  District of Columbia – https://otr.cfo.dc.gov/
  Georgia – https://dor.georgia.gov/
  Hawaii – https://tax.hawaii.gov/
  Idaho – https://tax.idaho.gov/
  Illinois – https://www2.illinois.gov/rev/Pages/default.aspx
  Indiana – https://intime.dor.in.gov/eServices/
  Iowa – https://tax.iowa.gov/
  Kansas – https://www.ksrevenue.gov/
  Kentucky – https://revenue.ky.gov/Pages/index.aspx
  Louisiana – https://revenue.louisiana.gov/
  Maine – https://www.maine.gov/revenue/
  Maryland – https://www.marylandtaxes.gov/
  Massachusetts – https://www.mass.gov/orgs/massachusetts-department-of-revenue
  Michigan – https://www.michigan.gov/taxes
  Minnesota – https://www.revenue.state.mn.us/
  Mississippi – https://www.dor.ms.gov/
  Missouri – https://dor.mo.gov/online-services/
  Montana – https://mtrevenue.gov/
  Nebraska – https://revenue.nebraska.gov/
  New Jersey – https://www.nj.gov/treasury/taxation/
  New Mexico – https://www.tax.newmexico.gov/
  New York – https://www.tax.ny.gov/ (New York State Department of Taxation and Finance)
  North Carolina – https://www.ncdor.gov/ (North Carolina Department of Revenue)
  North Dakota – https://www.tax.nd.gov/ (North Dakota Office of State Tax Commissioner)
  Ohio – https://tax.ohio.gov/
  Oklahoma – https://www.ok.gov/tax/
  Oregon – https://www.oregon.gov/DOR/pages/index.aspx
  Pennsylvania – https://www.revenue.pa.gov/
  Rhode Island – https://tax.ri.gov/
  South Carolina – https://dor.sc.gov/
  Utah – https://tax.utah.gov/
  Vermont – https://www.vermont.gov/tax
  Virginia – https://www.tax.virginia.gov/
  West Virginia – https://tax.wv.gov/
  Wisconsin – https://www.revenue.wi.gov/
  
  Other States Without Broad Wage Income Taxes, these states do not impose general income tax on wages (though some may tax investment income):
  Alaska – No broad income tax system (taxes oil & special items)
  Florida – No state income tax
  Nevada – No income tax
  South Dakota – No income tax
  Texas – No income tax
  Washington – No income tax (capital gains tax applies)
  Wyoming – No income tax
  Tennessee – No wage income tax (interest/dividends may be taxed in some years)
  New Hampshire – Income tax on interest/dividends only (no wage tax