Because Registered retirement savings plans (RRSPs) are registered with the CRA and come with tax benefits & limitations, internal transfers of either cash or investments into these types of accounts have special considerations. This does not apply for transfers from an RRSP to another RRSP however.
Any transfers of cash or investments into an RRSP account are considered contributions by the CRA, and Questrade will issue a contribution slip for tax season. Generally speaking, contributions into an RRSP account decrease your overall taxable income for the year by the amount of the contribution.