The required test sets
The guide describes sandbox subscription and callback-URL registration, followed by two test sets. Set A provides original and negative amendment cases plus duplicate-record validation; Set B asks for 10–20 fictitious individual and business records. Fixed test-organisation details are part of the prescribed scenario and differ from real production identities. The expected results include successful acknowledgement codes and an identified duplicate error.
Evidence for approval
The guide asks developers to provide the specified acknowledgement codes and record totals for review after successful tests. These test submissions demonstrate integration behaviour and do not report actual commission income. The document is labelled for YA 2022 and version 2.0 dated 31 May 2023. Confirm the applicable test pack before a new integration, and keep testing isolated from production; a sandbox acknowledgement is not a receipt for a live taxpayer submission.
Official source
A concise, independent Apex Gateway guide based on the official English source, not a reproduction of the complete document. Consult the original for full conditions, exceptions and subsequent updates.
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