SDLT1 Online Submission Assistance

I have just completed a 15-year commercial lease on behalf of my client (the tenant) and now need the SDLT1 filed with HMRC through the online portal. All figures, lease details, and supporting documents... (Budget: ₹600 - ₹1500 INR, Jobs: Accounting, Contracts, Finance, Financial Consulting, Intuit QuickBooks, Tax, Tax Compliance, Tax Preparation)