December 31, 2010
December 31 of the year you turn 71 years of age is the last day you can contribute to your own RRSP.
January 31, 2011
Due Date for filing and remitting Goods and Service Tax / Harmonized Services Tax (GST/HST) for the prior quarterly reporting period. (Applicable to businesses, not personal tax.)
Starting February 2011, you can get a printed copy of the 2010 General income tax and benefit package mailed to you by calling the CRA at 1-800-959-2221. Between February and early May 2011, the General guide and forms book for your province or territory are available from any postal outlet or Service Canada office near you.
February 2010 (TBD)
The first day for using TELEFILE or NETFILE to electronically file your 2010 CRA tax return will be announced early in 2011. For TELEFILE, call 1-800-959-1110.