Your Checklist: What to Do Before 1 July 2026

  • Confirm your VAT registration status -

Verify that all legal entities within your group are correctly registered and that registration details match your current trading structure.
  • Assess your current invoicing system -

Determine whether your accounting software can produce structured XML output and whether it has existing integration pathways with any of the 28 ASPs.
  • Evaluate and appoint an Accredited Service Provider -

Compare ASPs on integration capability with your system, pricing, support model, and onboarding timelines. Appoint before 1 July 2026.
  • Clean your accounting data -

Resolve outstanding VAT mismatches, supplier record inconsistencies, and ledger errors before integration begins. Dirty data in a structured system creates compounding problems.
  • Complete integration and test thoroughly -

Work with your ASP to connect, test, and sign off on the integration before your mandatory go-live date — not on the day of.