Start by confirming whether the service is a regulated user-to-user service in one of the categories covered by Schedule 8. Transparency reports are the Ofcom-facing reports that set out how a service deals with online safety matters such as illegal content, content harmful to children, reporting and complaints systems, moderation, algorithms, and other safety measures.
For a useful internal answer, name the exact reporting trigger, the affected service, the information Ofcom can ask for, the owner, the evidence pack, and the date the report or notice response is due. Keep the Online Safety Act source, service-scope decision, risk assessment, children access assessment, code-of-practice mapping, and Ofcom-facing record together.