Section 83(6) in The Central Goods and Services Tax Rules, 2017
(6)Any registered person may, at his option, authorise a goods and services tax practitioner on the common portal in FORM GST PCT-05 or, at any time, withdraw such authorisation in FORM GST PCT-05 and the goods and services tax practitioner so authorised shall be allowed to undertake such tasks as indicated in the said authorisation during the period of authorisation.
