Ontario GST/HST Return Filing

I operate a consulting sole proprietorship in Ontario and the CRA has asked me to file GST/HST returns for 2023 and 2024. All revenue figures are ready and I already maintain detailed records of every GST/HST amount collected on my invoices... (Budget: $2 - $8 CAD, Jobs: Accounting, Data Entry, Financial Analysis, Financial Consulting, Tax, Tax Compliance, Tax Preparation)