When the registration of a registered person other than an Input Service Distributor or a non-resident taxable person or a person paying tax under the composition scheme or TDS/ TCS; has been cancelled, the person has to file a final return within three months of the date of cancellation or date of order of cancellation, whichever is later, electronically in FORM GSTR-10 through the common portal either directly or through a Facilitation Centre notified by the Commissioner.

Source: CBIC Website