I am an applicant/taxpayer. How can I track status (with TRN) of my new registration application that I have submitted on the GST Portal? You can track the status of new registration application using ARN , once Part B of new registration application is submitted on the GST Portal, post-login (using TRN). Track the status of your GST application easily on this portal using relevant details. Enter Application Reference Number or ARN to track GST Registration Status . Quicko does not store ARN or any GST details of the applicant. ARN is directly submitted to the GST portal to fetch the current status of the application. File in minutes with easy-to-follow steps on your computer or phone. This allows users to check the status of their GST registration application using the Application Reference Number (ARN). This service provides real-time updates on the progress and approval of the application.