What your books have to prove, and for how long
An audit trail is not paperwork. It is the difference between a number you can defend and a number you are asserting — and the retention rules run longer than most people assume.
3 min read
audit trail
Every post tagged audit trail.
Input tax credits are an evidence problem, not a maths problem
The arithmetic of claiming back GST/HST is trivial. What gets claims denied on audit is missing documentation and tax claimed on things that were never recoverable.
3 min read
Why your books should be an immutable ledger
A real ledger never lets a posted entry be silently edited or deleted — corrections happen by reversing. Here's why that matters, and how Comma enforces it.
2 min read