API Support

Hello everyone.

I'm starting a small business in Ontario and trying to understand the tax requirements before registering anything officially. I've read mixed advice online about when you actually need to register for HST, how long the process takes, and what happens if you make a mistake early on.

Specifically, I'm confused about the ontario business hst number and whether sole proprietors must have one right away or only after reaching a revenue threshold. Can someone explain practical steps, common pitfalls, and how audits or penalties work for new businesses just starting out?

Any real-world experiences or tips would be appreciated here.