Deadline extension under Goa GST notification postpones the specified compliance date for the relevant proviso to a later date. Amendment revises the first proviso of the third paragraph of Notification No. 38/1/2017-Fin(R&C)(100)/2805 dated 08-05-2019 by substituting the previously stated compliance date with a later date, thereby postponing the deadline specified in that proviso under the Goa Goods and Services Tax framework.