I missed August-2018 month purchase invoice for GST return, (Input credit) then, have any possibilities to take that missed invoice to September 2018 returns.
You can Avail the ITC benefits in Your next GSTR 3B return...
2. Add the missed sales value in Your next GSTR 3B return. But, avoid this mistake in future. Bcoz Sale bill is our liability. Some times Dept can't accept our reasons...