# Tax Deadlines · Canadian tax guides

> 2 Canadian guides tagged Tax Deadlines — CRA rules, kilometres, and Form T2125.

Canonical: https://everylastmile.app/ca/tag/tax-deadlines

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## [GST/HST Filing Deadlines and Penalties (2026)](https://everylastmile.app/ca/gst-hst-filing-deadlines)

How the CRA assigns your GST/HST filing frequency, how to change it with Form GST20, every 2026 deadline, and the penalty formula most sites get wrong.

_2026-08-18 · EveryLastMile_

## [Self-Employed Tax Deadlines in Canada (2026–2027)](https://everylastmile.app/ca/self-employed-tax-deadlines)

You file by June 15 but pay by April 30. Here's every deadline a self-employed Canadian needs, plus what the gap between those two dates actually costs.

_2026-08-14 · EveryLastMile_