If your GST registration has been cancelled for more than two years, you can still reactivate it by following the correct process. To activate cancelled GST registration after 2 years, you need to file an application using **Form GST Reg 21**, ensuring that all necessary documents are provided. Before submitting the application, make sure that any pending returns have been filed and any outstanding penalties are paid. By completing this process, you can regain the ability to collect GST, claim input tax credits, and stay compliant with GST regulations, helping your business operate smoothly and within the law.