The credit you are seeing is probably the Canada employment amount which is a non-refundable tax credit. Turbo Tax automatically calculates and applies this credit based on the amount of employment income you are reporting. For more info, please see http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns360-390/363-eng.html
