Any suggestions for best and cheapest personal tax software for home pc?

I used StudioTax few years back. Didn't had any issues.
It's free, download here ..
(http://www.studiotax.com/en/main.htm)

QuickTax.ca is good as well. It's approx $20 per filing. But you pay only when you decide to generate the "netfiling" file. A good place to play around with numbers, as it shows you your updated refund on each page.

hehe .. check this

(http://en.wikipedia.org/wiki/Canadian_tax_preparation_software_for_personal_use)

I have been using Ufile for last 4 years... if your income is less than 20 K i think its free else they charge you $15/return.