Each report must have a unique Reporting ID. 
Persons subject to the reporting obligation may not reuse the same Reporting ID for the same reporting type.

The Tax Agency recommends that the Reporting ID be set up as a UUID (Universally Unique Identifier).

Most programming languages support UUID generation, and on the Internet you can find ready-made programs that can generate UUIDs automatically. See the description of UUID.

A reporting ID could be, for example, 33921553-7fce-7cec-bf7b-e7c86194060b.

The Reporting ID is not shown in the lessor’s tax information in E-tax.