Official GST and CBIC references for live GST forms, rules-based form PDFs, and offline utilities.
CGST Rules 2017 Part B (Forms)
CBIC
Official CBIC PDF covering GST forms mapped through the CGST Rules, 2017.
GST forms available on the GST common portal
GSTN
Official GSTN forms inventory PDF showing portal-available GST form families and descriptions.
ITC-04 offline utility and guide
GSTN
Official GSTN PDF for the ITC-04 offline utility and user guidance.