This endpoint is now deprecated and will be removed in Jan 2022.
You should instead use the Update method and set the State to Finalised. Returns True if the resulting FPS has been automatically submitted due to the Employers RTISubmissionSettings, otherwise returns false.
You can suppress the emailing of payslips to employees by adding a key named dontEmailEmployeePayslips with a value of true to the body. See the related guides for more information.