Here's information on dependants:
https://support.turbotax.intuit.ca/turbotax/en-ca/faqs/Who-can-I-claim-as-a-dependant-and-what-can-I...
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/305/menu-eng.html
http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/306/menu-eng.html