You must have your employer complete form T2200 - Declaration of Conditions of Employment.  You will then complete Form T777 Statement of Employment Expenses.  For more info on the parking expenses you can claim and the forms that are required, please see http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns206-236/229/slry/prkng-eng.htm...