Can I change my representative partway through an application without restarting the process?

Yes. You can change representatives at any point during an ongoing application. This is done by revoking the current representative's authorization and submitting updated representative information for the new one, and it does not restart the application itself — the application continues in its existing place in processing under the new representative's involvement.

The practical concern in a mid-application change is continuity, not the process restarting. It is worth confirming the new representative has a complete picture of the file's history, including what has already been submitted, any outstanding requests from IRCC, and any deadlines that are approaching, so that nothing gets missed during the handover between representatives. A change made without this kind of handover can create real gaps even though the application formally continues without interruption.

Anyone changing representatives partway through should treat the transition itself as something to manage carefully, gathering copies of everything submitted so far and confirming with IRCC that the change has been properly recorded, rather than assuming the new representative will automatically have full access to everything.