Are you refering to line 314 - Pension income amount found on the Schedule 1?
If So, the following CRA link will explain why this amount was calculated on your wifes return: http://www.cra-arc.gc.ca/tx/ndvdls/tpcs/ncm-tx/rtrn/cmpltng/ddctns/lns300-350/314/lgbl-eng.html
Line 314 - Pension income amount
You may be able to claim up to $2,000 if you reported eligible pension, superannuation, or annuity payments online 115, line 116, and/or line 129 of your return.
