T183 Electronic Signature: The CRA Rules
The CRA accepts electronic signatures on the T183, with no identity quiz required. Here is what the rules require, and how to collect a clean signed T183.
By Rashad Bayram | Published: 7/14/2026
The short answer: The CRA accepts electronic signatures on the T183, the form that authorizes you to electronically file a client's return. Unlike a remotely e-signed US Form 8879, it does not require a knowledge-based identity quiz (KBA). What the CRA does require is straightforward: you must have verified the client's identity, the signature must carry a date and time stamp (you cannot file the return before that date), the signed form must be exchanged through a controlled channel such as a secure portal rather than any ad-hoc email address, and you must keep it for six years. Below is what the rules actually say, where the responsibility sits with you rather than the software, and how to collect a clean, defensible signed T183. If you EFILE Canadian returns, the T183 is the small form with the big consequence: it is the client's authorization for you to transmit their return to the CRA. Getting the signature is often the last thing standing between a finished return and a filed one, and for years that meant printing, chasing a wet signature, and scanning it back. It no longer does. Does the CRA accept an electronic signature on the T183? Yes. The CRA accepts electronic signatures on the T183 (and the T183CORP for corporations) as a valid authorization to electronically file a return. The client can apply the signature on their own device, remotely. This is settled, permanent CRA policy, not a temporary pandemic measure, and it is confirmed in the CRA's guidance on using electronic signatures . That single fact removes the biggest bottleneck in filing season: you no longer need the client in the room, or a printer, to get a return out the door. What the CRA actually requires An electronically signed T183 is valid when a few conditions are met. None of them is onerous, but each matters: You have verified the client's identity. The CRA expects the preparer to be satisfied that the person signing is who they say they are. It does not prescribe how. Reviewing government photo ID for a new client, or relying on an established relationship with an existing one, is the common approach, though that is practice guidance rather than a CRA rule. The signature carries a date and time stamp. The CRA asks for a date-and-time stamp on the forms that need one, in the format year/month/day and hour/minute/second. You cannot electronically file the return before that signing date. The signed form travels through a controlled channel. This is the condition most often missed. Where the signature is not applied in person, the CRA requires the signed form to be sent to the other party either using "the electronic address most recently provided to the other party for that purpose," or through "an access controlled, secured electronic location, such as a secure website," reachable only because the other party granted access. You keep the signed form for six years. The CRA can ask to see the signed T183, so retain it (paper or electronic) for at least six years following the date the return was electronically filed. Notice what is not on that list: there is no mandatory identity-quiz step, no third-party credit-record check, no special authentication technology. The responsibility to know your client is yours, and the CRA trusts your professional judgment to meet it. But notice what is on it. The CRA is lighter than the IRS on proving who the client is, and stricter on the channel the signed form moves through. An address a client mentioned once on the phone is not an address "most recently provided for that purpose," so a plain PDF round-trip satisfies neither limb. A secure portal is designed to meet the second one. Why the T183 is simpler than the US 8879 If you also prepare US returns, the contrast is worth understanding, because it is easy to assume the two work the same way. They do not. For a remotely e-signed US Form 8879 , the IRS requires knowledge-based authentication : the taxpayer enters their SSN and answers a quiz of questions pulled from public and credit records before they can sign. It is a hard, technology-specific requirement, and skipping it makes the remote signature non-compliant. The T183 has no such rule. The CRA achieves the same goal, a signature you can stand behind, through the preparer's identity verification and a dated, retained record, rather than a mandated quiz. So a Canadian preparer can collect a compliant e-signature with far less friction than a US preparer chasing an 8879. If your practice spans both countries, treat them as two different processes, not one. If you do prepare US returns, it is worth knowing exactly when that identity quiz bites and when it does not, because the rule is narrower than most preparers assume. When Form 8879 requires KBA covers the three situations where the IRS does not require it, including the handwritten-signature exclusion that Publication 1345 states outright. How to collect a clean, defensible T183 signature Meeting the rule is easy. Producing a record you would be comfortable handing the CRA is where a good process earns its keep. A clean T183 e-signature flow does three things: Sends the form securely , not as a plain email attachment. A T183 carries a SIN and financial data, and email is neither encrypted end to end nor a reliable channel for tax documents. Captures the signing event , not just the signature: the date and a timestamp, so you can prove the return was not filed before it was authorized. Produces an audit trail you can retrieve on demand, rather than a signed PDF buried in an inbox. The difference between "the client emailed it back signed" and "here is the dated, timestamped, verifiable record of the signing" is the difference between hoping a file review goes well and having the record to show for it. Where Taxformify fits This is one of the steps I built Taxformify to handle cleanly. You upload the T183, send it to the client to sign through a secure portal, and automatic reminders go out on day three and day five if it is still outstanding. When the client signs, you are emailed the signed copy, and each signature comes with a Certificate of Signature that records the signing date, a timestamp, the signer's IP address, and a verifiable link, exactly the kind of dated audit trail that makes a signed T183 easy to defend. To be clear about the boundary: Taxformify captures and records the signature; verifying your client's identity remains your responsibility , as the CRA intends, and Taxformify does not electronically file the return for you. It gives you a clean, retained, timestamped record and removes the chasing around it. It is built for both Canadian and US practices, so it slots into a T2125 workflow or a Schedule C one. One boundary for US readers: Taxformify does not run knowledge-based authentication, so it is not the tool for a remotely e-signed Form 8879. See when the IRS requires KBA . I am not a CPA, and neither is my co-founder, but he runs a tax practice with over 1,500 clients, and getting signatures without the paper chase was high on his list. If you want to see the T183 signing flow run end to end, the fastest way is to book a short demo and watch it on a real form. One caveat: this is general information, not tax or legal advice, and CRA requirements can change. Confirm the current rules for the form and year you are filing against the CRA guidance linked above. Frequently Asked Questions Does the CRA accept electronic signatures on the T183? Yes. The CRA accepts electronic signatures on the T183 and T183CORP as a valid way for a client to authorize you to electronically file their return. The signature can be applied by the client on their own device. The key conditions are that you have verified the client's identity, the signing carries a date and time stamp, the form is exchanged through a controlled channel rather than any ad-hoc email address, and you retain the signed form. Does an e-signed T183 require knowledge-based authentication (KBA)? No. Unlike the US IRS, which requires knowledge-based authentication (an SSN-plus-identity-quiz step) for a remotely e-signed Form 8879, the CRA does not mandate KBA for the T183. The CRA does expect you, the preparer, to be satisfied of the client's identity, but it does not prescribe a specific identity-quiz technology to do it. What does an electronically signed T183 have to capture? The signature has to be applied by the client and the signing has to carry a date and time stamp: year, month, day and the time to the second. The return cannot be electronically filed before the date the T183 was signed. The CRA also expects the preparer to have verified the client's identity, and the signed form must be kept on file. A defensible record also carries an audit trail of the signing event. How long do I have to keep a signed T183? Keep the signed T183 for at least six years following the date the return was electronically filed, in case the CRA asks to see it. This applies whether the signature is on paper or electronic. An electronic copy with a clear timestamp and audit trail satisfies the retention requirement and is easier to produce on request than a paper file. Can I just email the T183 to the client to sign? Not to any address you like. Where the signature is not applied in person, the CRA requires the signed form to be sent to the other party either using the electronic address most recently provided to that party for that purpose, or through an access controlled, secured electronic location such as a secure portal made known and granted to the individual. A plain PDF sent to an address a client mentioned on the phone fails that condition, and it produces no reliable record of who signed, when, and from where. A proper e-signature flow captures the signing date, a timestamp, and an audit trail, which is what makes the signed T183 defensible if the CRA ever asks. Is the T183CORP treated the same way? Broadly yes. The T183CORP, used to authorize electronic filing of a corporation's T2 return, follows the same electronic-signature approach: an authorized signing officer signs, you verify their authority and identity, the signing carries a date and time stamp, the signed form travels through the same controlled channel, and you retain it. Always confirm the current CRA guidance for the specific form and year you are filing. Disclaimer This article is for general informational purposes and is not tax advice. Tax laws change frequently and individual situations vary. TaxFormify does not provide tax advice. Consult a chartered professional accountant for guidance on your specific circumstances. Further reading Form 8878 vs 8879: Which IRS e-File Authorization Do You Need? : the US e-file signature authorizations, for the cross-border picture. KBA and Form 8879: When the IRS Requires an Identity Quiz : the US identity-verification rule the T183 does not have, and the three cases where it does not apply. Tax Workflow Automation: A Day in the Life : where signatures fit in the wider filing-season workflow. The Tax Client Questionnaire That Builds Its Own Document Request : getting the documents in before the signature stage. T2125 Expense Categories Explained : the Canadian expense reference for the return you are filing. Sources CRA, Form T183 (Information Return for Electronic Filing) CRA, Using electronic signatures CRA, EFILE for electronic filers IRS, About Form 8879 and IRS Publication 1345 (PDF) , the US knowledge-based-authentication rule, for contrast