If you are still unable to access your T4, you can contact the CRA at 1 (800) 959-8281 directly to request a copy. For more information on how to request copies of your T-slips, please refer to the Canada Revenue Agency (CRA) page; Get a copy of your slips
Please note that a tax expert will not be able to access your T4s without your authorization or permission from the Canada Revenue Agency (CRA). As per the CRA, You can authorize your representative online using the "Authorize my representative" service in My Account and your representative will have instant access to your information and the online services to easily manage your account. You can also view, change, or cancel your representative's authorization online at any time. For more information on how you can authorize or cancel a representative, go to Representative authorization.
For more information, please visit TurboTax FAQs page: How to Request a T4 from Canada Revenue Agency
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