7B. Revision of Return– (1) An assessee may submit a revised return, in Form ST-3, in triplicate, to correct a mistake or omission, within a period of [ninety days] from the date of submission of the return under rule 7.

(2) An assessee who has filed the annual return referred to in sub-rule (3A) of rule 7 by the due date may submit a revised return within a period of one month from the date of submission of the said annual return;Inserted vide Notification 19/2016-Service Tax

Explanation.- Where an assessee submits a revised return, the ‘relevant date’ for the purpose of recovery of service tax, if any, under section 73 of the Act shall be the date of submission of such revised return.