Sometimes, the GST department cancels a taxpayer’s GST registration on its own (this is called Suo moto cancellation). This usually happens because returns were not filed for a long time. If your GST registration is cancelled by the tax officer, you can apply to get it restored. This process is called revocation of cancellation of GST registration. https://www.corpzo.com/revocation-of-gst-registration-status-in-india