Such person is required to furnish the details of stock, including the inward supply of goods received from unregistered persons, held by him on the 30th day of June, 2017 electronically, in FORM GST CMP-03, on the common portal,
either directly or through a Facilitation Centre notified by the Commissioner, within a period of sixty days from the date on which the option for composition levy is exercised or within such further period as may be extended by the Commissioner in this behalf. Further, if on 1st July, 2017 such person holds in stock goods that have been received from outside the State or imported from outside the Country, he is not eligible to opt for composition scheme.
(FAQ 44: MSME)