T661 Software: CRA Project Narrative Tool for Canadian Companies

CRA's T661 form is the heart of every SR&ED claim. T661 software guides you through each section with structured questions modelled on CRA's own eligibility criteria.

What CRA's T661 form requires

The T661 form requires detailed project descriptions for each R&D project in your claim. Each description must address three core elements: technological uncertainties, systematic work performed, and technological advancements achieved. The form also requires financial schedules (Schedule 31) documenting eligible expenditures.

How T661 software structures the narrative

• Technological uncertainty: what technical problem couldn't be solved using standard practice?
• Systematic investigation: what steps did you take to resolve the uncertainty?
• Technological advancement: what new knowledge or capability did your work create?
• Evidence mapping: linking your Git commits, design documents, and test records to each narrative section
• Financial allocation: assigning eligible expenditures to the correct project and expenditure category

Why evidence mapping matters for T661

CRA's T661 is a narrative document, but it needs to be substantiated. An evidence index bridges your narrative and your documentation — showing that each claim you make in the T661 is supported by contemporaneous records.

T661 and the filing deadline

T661 must be filed within 12 months after the filing due date of the T2 corporate return (generally 18 months after fiscal year end). There are no extensions. Missing this deadline means forfeiting the credit for that year entirely.