United States Department of State (visas; 2-yr rule)

• Main page: http://www.state.gov
• Worldwide consulates/embassies: http://usembassy.state.gov
• Waiver information: http://travel.state.gov/visa/temp/info/info_1288.html

United States Citizenship and Immigration Services (USCIS) (immigration status)

• Main page: http://uscis.gov/graphics/index.htm
• Texas Service Center: http://uscis.gov/graphics/fieldoffices/texas/index.htm
• Forms: http://uscis.gov/graphics/formsfee/index.htm

Internal Revenue Service (IRS) (tax information, ITIN numbers for dependents)

• Main page: http://www.irs.gov
• ITIN numbers (do a search for "itin"): http://www.irs.gov
• IRS forms and publications: http://www.irs.gov/formspubs/index.html

Social Security Administration (Social Security Numbers and Cards)

• Atlanta office: http://www.ssa.gov/atlanta/index.htm

International Embassies in Washington, D.C.

• List of embassies: http://www.embassy.org/embassies