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HST combines the 5% federal GST with a provincial component in five participating provinces. For 2026 the combined rates are 13% in Ontario, 15% in New Brunswick, Newfoundland and Labrador, and Prince Edward Island, and 14% in Nova Scotia since 1 April 2025. Elsewhere you charge the 5% GST alone, or GST plus a separate provincial tax. The rate follows the province of supply, not where your business sits.

Most enquiries are settled without a phone call in My Account, My Business Account or Represent a Client, where assessments, balances, slips and CRA mail all sit. When you need a person, use the enquiries line for your programme from the contact page on canada.ca, and have your social insurance or business number plus a figure from a recent return ready for identity checks. Written enquiries go to the tax centre named on your notice of assessment.

Income tax starts once taxable income passes the basic personal amount, and a separate provincial or territorial amount applies on top, so the break-even point shifts every year with indexation and differs by where you live. Look up the current amounts on the CRA site or in the year's return package. Credits for tuition, disability, pension income or dependants push the point higher. Filing can still be worthwhile or required with no tax owing, for benefits and credits.

Non-taxable income is money you receive that never enters taxable income. Common examples are lottery and most gambling winnings, gifts and inheritances, growth and withdrawals inside a TFSA, the GST/HST credit and Canada child benefit, most life insurance death benefits, and child support under current-rule agreements. A few amounts are reported and then deducted, such as workers' compensation and social assistance, because they still affect benefit calculations, so report anything that arrives on a slip even when no tax results.