The Registered Persons may opt to pay tax under composition scheme with effect from the first day of the month immediately succeeding the month in which he files an intimation of opting for Composiition Scheme, on the common portal on or before the 31st day of March, 2018.
Therefore the composite scheme will be applicable to the registered person from the next month of the month in which he makes application.
Further he furnish the statement in FORM GST ITC-03 in within a period of ninety days from the day on which such person commences to pay tax under composition Scheme.
Further it is also notified for clarification that the registered person who opts to pay tax under Composition Scheme with effect from the first day of a month which is not the first month of a quarter shall furnish the GST return in FORM GSTR-4 for that period of the quarter for which he has paid tax
under Composition Scheme and shall furnish the returns as applicable to him for the period of the
quarter prior to opting to pay tax under section 10.
Notification no-45/2017 – Central Tax dated 13.10.2017