EFILE - Forms T1013 and / or MR-69-V - 2016 and prior tax yearsUnfortunately, UFile cannot generate the forms T1013 - "Authorizing or Cancelling a Representative" and / or MR-69-V - "Power of Attorney, Authorization to Communicate Information, or Revocation".
You can download them from the CRA and Revenu Québec websites.
ARC:http://www.canada.ca/en/revenue-agency/services/forms-publications/forms/t1013.html
Revenu Québec:http://www.revenuquebec.ca/en/online-services/forms-and-publications/current-details/mr-69-v/
However, the forms T183 - and TP-1000.TE-V can enable you to represent your client. To do this, in the section "EFILE" from QuikClik Navigator you must select the following option "Represent the client on income tax matters" on the line "Electronic filer authorized to represent clients (T183 Part D)".
ID: 20130716143917NIX.xml
Webpage: KPX210-20130716143917NI.htm