Search only in titles Managing Sub-Tier Contractors and Suppliers Edit Sub-Tier for Subcontractors Use the Edit Sub-Tier page to change details for a VAT Invoice Only Sub-Tier (VAT Sub) or Manual Contractor. You can also use this page to delete Manual Contractors. Updating Sub-Tier Details for SubcontractorsAbout Deleting a VAT Invoice Only or Manual Sub-Tier for SubcontractorsNavigate to the Edit Sub-Tier Page