Suemoto to REVOCATION

You can apply for Gst revocation within 90 days.or if 90 days are passed after receiving RC cancellation order you can apply To appellate Authority through APL-01 form. But u have to first pay all taxes interest ,late fees till date with workings you have to meet your jurisdiction officer. and submit in person aur through mail.

Procedure
A registered person can submit an application for revocation of cancellation, in form GST REG-21, if his registration has been cancelled suo moto by the proper officer.
He must submit it within 30 days from the date of service of the cancellation order at the Common Portal.
If the proper officer is satisfied he can revoke the cancellation of registration by an order in form GST REG-22 within 30 days from the date of receipt of the application. Reasons for revocation of cancellation of registration must be recorded in writing.
The proper officer can reject the application for revocation by an order in form GST REG-05 and communicate the same to the applicant.
Before rejecting, the proper officer must issue a show cause notice in form GST REG–23 for the applicant to show why the application should not be rejected. The applicant must reply in form GST REG-24 within 7 working days from the date of the service of notice.
The proper officer will take decision within 30 days from the date of receipt of clarification from the applicant in form GST REG-24.