Write to your ministers and demand that the Income Tax Act stop discriminating against single father's, demand equal rights to claim your children, and equal rights to the CCB... demand the repeal of "122.6 (f) where the qualified dependant resides with the dependant’s female parent, the parent who primarily fulfils the responsibility for the care and upbringing of the qualified dependant is presumed to be the female parent"

http://laws-lois.justice.gc.ca/eng/acts/i-3.3/page-122.html#h-37