Documents require for RG1 and ER1
Please can you provide Documents on RG1 Register and ER1 form, and what is the use of that and when it can be used?
You can find the documentation for RG1 in help.sap.com, I am providing
you the link for India localisation.
The topic "Excise registers" is under materials Management of India
For ER1, please see the explanation given in the note 888936.