税表上有一项 (305), 但条件非常苛刻:
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/305/lgbl-eng.html
You may be able to claim this amount if, at any time in the year, you met all of the following conditions at once:
You did not have a spouse or common-law partner or, if you did, you were not living with, supporting, or being supported by that person.
You supported a dependant in 2012.
You lived with the dependant (in most cases in Canada) in a home that you maintained. You cannot claim this amount for a person who was only visiting you.
In addition, at the time you met the above conditions, the dependant must also have been either:
your parent or grandparent by blood, marriage, common-law partnership, or adoption; or
your child, grandchild, brother, or sister, by blood, marriage, common-law partnership, or adoption and under 18 years of age or has an impairment in physical or mental functions.