Parents passed away and I've been caring for both my little brother and sister since may2013. i read online that h&r block online tax program might not give me as much money as i should get because they arent my own children, is this true? should i use turbotax, doesl it matter who's kids they are?

neither of them work, one is 13 the other is 18 and a college student. in california your parents are responsible for your education until youre 24, in our circumstance, can i be considered responsible and therefore claim some school expenses?