The GST R1 return is again a most important document which shall be generated through invoice. All the key components of GST R1 should be present in the invoice.
GST R1 mandates that detail of invoice should be uploaded in the GSTN server. A consolidated supply can also be uploaded if certain conditions are satisfied.
On the basis of GST R1, GST R2 and GST R3 shall be auto populated.
Every person shall upload sales invoice and the other party (purchaser) shall confirm it on the given dates.
This is the base of self assessment where sales and purchase shall be matched.
Link : https://youtu.be/3A0TYp8Uqfc