Ontario Corporate & HST Filing Guide

I run an Ontario-based corporation and now that my bookkeeping is up to date I’d like to handle our own tax compliance in-house. What I need is clear, practical instruction—not a done-for-you service—covering both the federal T2 corporation tax return and the GST/HST (Ontario) return.

Here’s what I’m after:

• A step-by-step, plain-English walkthrough of the entire process, starting with the year-end trial balance I already have and ending with successful submission through CRA My Business Account (or compatible software such as TaxPrep, CanTax, TurboTax Business, etc.).
• Explanations of every key screen and form I’ll encounter—T2 jacket, Schedule 1, Schedule 100/125, Schedule 50, GST34, RC59—as well as common pitfalls and reconciliation tips.
• Best-practice checklists for supporting documents so I know exactly what to keep on file in case of audit.
• A brief section on due-date scheduling and interest/penalty calculations so I understand the consequences of late filing.
• Optional follow-up: one Q&A session (voice or video) once I have my drafts ready, just to confirm I’m on the right track.

Acceptance criteria: I can complete a mock return from my own source data without errors flagged by CRA validation and with every required schedule attached.

If you’ve successfully guided clients or junior staff through DIY corporate and GST/HST filings in Ontario and can distill that knowledge into an easy-to-follow package, I’d love to work with you.