My daughter is at university. how do I claim her travel expences? do I make one claim for her trip home to work in May and then claim again for her return to school?

You cannot claim any of these amounts on your return.  However, your daughter may be able to claim some of her eligible moving expenses on her return.  For more info on claiming moving expenses as they pertain to students, please see http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns206-236/219/stdnt-eng.html