I have income (T4 and T5s), my spouse does not have any. Should I claim all income in my T5s, or should I allocate a percentage to my spouse?

You must claim all income from your T5s on your tax return if your Social Insurance Number (SIN) appears on the slip. Generally, income is allocated to the spouse who earned the money used to purchase the investments or whose name is on the investment accounts.

you can allocate ONLY IF slip is issued to both of you, joint account and you are doing joint return