Article 1673 bis of the French General Tax Code
The withholding tax payable under the provisions of Article 115 quinquies is declared and paid to the Treasury by the company no later than the fifteenth day of the fourth month following the end of the financial year. If the financial year ends on 31 December or if no financial year ends during the year, the payment is made no later than 15 May. (1). (1) See Annex II, art….