There are a number of approved software programs (online) that you can use to prepare and file your 2013 personal tax return.
For the most part, the criteria will be based on what type of return you have and/or income level.
To see if you qualify, check out CRA’s Netfile page.
From CRA’s website:
“NETFILE is one of our electronic tax-filing options. This transmission service allows you to file your personal income tax and benefit return directly to the Canada Revenue Agency (CRA) using the Internet.
The NETFILE program will be open for transmissions on February 10, 2014, until January 16, 2015, for the electronic filing of your 2013 personal income tax and benefit return. Tax returns filed via NETFILE must first be prepared using a NETFILE-certified product.
There are free certified products available for taxpayers to file their income tax return online.”