If you did not deduct all the contributions you made to your RRSP or to a spousal RRSP or common-law partner RRSP in 1991 and later years, you have two options:
Note
In either case, a tax may apply to the unused contributions. For more information, see Excess contributions.
If the unused contributions are withdrawn, you have to include them as income on your tax return. However, you may be able to deduct an amount equal to the withdrawn contributions that you include in your income.
For more information, see Withdrawing unused RRSP contributions.