The format of the Quarterly Report Reference Number must respect: <MSEST>/<EXEMPTID>-<Quarter>.<Year> Where <MSEST> is the country code of the MS of establishment; <EXEMPTID> is the exempt identification number, assigned to the taxable person by the MS of establishment for identification in the special scheme; <Quarter> is the quarter number (Q1, Q2, Q3, Q4); <Year> is the year, using four digits. Example: BE/BE123456789/Q2.2025