get https://example.com/v1/customerinvoice//specification/
If invoice accounting is activated and customer invoices including tax reduction is handled, this endpoint can be used as a basis for generating invoice rows in the accounting system with relevant tax reduction information such as Type of work, hours and amount. This is usually needed if the customers want to use built in support for applying for tax reduction to the Swedish tax agency.
Tax reduction percentage is not available in this endpoint but can be fetched using endpoint /type/taxreductionwork/{taxreductionworktype_id} using the taxreductionworktypeid field.