GSTN has issued a comprehensive guide dated November 05, 2020 for taxpayers on common errors on GST Portal and suggested solutions with respect to registration, returns, payment, refunds, E-way bill, appeal, and DRC-03.
The Complete Solutions Guide can be accessed at: https://tutorial.gst.gov.in/offlineutilities/gsterrorandresolution/gstissuesandsuggestedsolutions.pdf