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 is dated, 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 be dated, because the return cannot be electronically filed before the date the T183 was signed. In practice a defensible record also captures a timestamp and an audit trail of the signing event. The preparer must have verified the client's identity, and the signed form must be kept on file.

How long do I have to keep a signed T183?

Keep the signed T183 for at least six years from the end of the tax year it relates to, 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?

You can send it electronically, but a plain emailed PDF signed and emailed back is weak on two fronts: it is not a secure channel for a document containing tax data, 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 is dated, and you retain it. Always confirm the current CRA guidance for the specific form and year you are filing.

BusinessSoftware

T183 Electronic Signature: The CRA Rules and How to Collect One Cleanly

By Rashad Bayram•July 14, 2026•7 min read

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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 is dated, 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 be dated, because the return cannot be electronically filed before the date the T183 was signed. In practice a defensible record also captures a timestamp and an audit trail of the signing event. The preparer must have verified the client's identity, and the signed form must be kept on file.
How long do I have to keep a signed T183?: Keep the signed T183 for at least six years from the end of the tax year it relates to, 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?: You can send it electronically, but a plain emailed PDF signed and emailed back is weak on two fronts: it is not a secure channel for a document containing tax data, 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 is dated, and you retain it. Always confirm the current CRA guidance for the specific form and year you are filing.

About the author

Rashad Bayram

Writer & technology consultant focused on Islamic finance, halal Bitcoin, AI agents, and startups. Exploring ideas that matter with care and curiosity.

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