It's hard for us to determine in this forum what is causing your pension income to be doubling without seeing your entire return and individual tax situation.
Common reasons for this are:
- You have imported your tax information using the CRA AutoFill My Return service and manually entered your tax slips.
- You have entered your CPP and OAS income on the T4A screen in TurboTax, not on the T4A(P) - Canada Pension Plan and T4A(OAS) - Old Age Security screens they should be entered on.
- You are filing with a spouse and have entered their information on your return.
If after checking your entries and ensuring they are all entered properly on the corresponding screen in TurboTax, you are still seeing this issue, you can contact our Support Team by following the link below and in the field that says "Ask your question", type in "your question" and you will be directed to an agent that can assist you and have a closer look at your return. TurboTax Customer Support