This occurs when your GSTN details do not match with your PAN card details or your regional state code. 


It’s highly important that they match with each other, for the system will not allow you to save the details if there is a mismatch.  


Hence, please check the details and update the correct information in case any discrepancy arises. 


To get more information about how to update your GST number, pleaseclick here. 


Subscribe to ourYouTube Channel  to watch insightful videos.