Canada Revenue Agency:  
Phone: 1-800-959-5525
http://www.cra-arc.gc.ca
  
Obtaining a Business Number   
https://www.businessregistration-inscriptionentreprise.gc.ca/ebci/brom/bro/start.do?language=english
  
Workers Compensation Board:  Phone: 403-517-6000
Payroll Deductions (Calculating)
https://apps.cra-arc.gc.ca/ebci/rhpd/startLanguage.do?lang=English

City of Calgary Business License & Permits:   Phone: 403-268-5311
http://www.calgary.ca/PDA/pd/Pages/Business-licences/Contact-Business-Licence.aspx 
http://www.calgary.ca/General/Pages/Contact-Us.aspx

Calgary Foreign Exchange Rates
http://www.bankofcanada.ca/rates/exchange/exchange-rates-in-pdf/?page_moved=1

Tax rates
http://www.cra-arc.gc.ca/tx/llrts/menu-eng.html

TD1 Forms 
http://www.cra-arc.gc.ca/formspubs/frms/td1-eng.html
Currency Exchange Rates
http://www.bankofcanada.ca/rates/exchange/daily-converter/

Statistics Canada 
http://www.statcan.gc.ca/start-debut-eng.html