8.
Practical solution is as follows:
1. Prepare a month-wise reconciliation of GSTR-1, GSTR-3B and books of accounts.
2. Identify the reason for difference - is it due to failure to report credit note in GSTR-1, clerical mistake in B2B or B2C, duplication of invoices etc.
3. Give a detailed reply of the above along with documentary evidence ie sales register/ output tax collected register. Also emphasis that this difference has been rectified in GSTR-9 by Registered Person himself.
When there is a prima facie difference between statement of outward supply (GSTR-1) filed by registered person and the output tax paid by him (in GSTR-3B and DRC-03), the Department is right in calling for explanation regarding the same.
However once the difference is satisfactorily reconcilied along with documentary evidences such as sales register etc, the Department cannot impose tax merely on the values declared in GSTR-1. Basic principle here is that:-
1. Levy of tax and its demand fails in the absense of supply;
2. Onus is on department to prove that supply has taken place.
However, the above arguments should be given only at the later stage and initially, it is your responsibility to reconcile the difference between GSTR-1 and books along with proper reasoning and evidence.