21 September 2017
GSTR 3B submitted with mistakes then no way for changes.
If you have any liabilities pay as per GSTR 3B. Then you can adjust it in GSTR 1 2 and 3 returns...
Otherwise no way....
21 September 2017
Rectification in GSTR3B not possible so focus on correct filing of GSTR1, 2 & 3. Meanwhile you can contact GST helpdesk regarding the matter of correction in GSTR 3B and seek their views.