How to report negative value in HSN-wise summary if credit note value is higher than invoice value?

Table 9 needs these Amendments to outward supplies that are taxable and reported in table 4,5 & 6 of the earlier tax periods’ GSTR-1 return (including debit notes, credit notes, refund vouchers issued during the current period)

Table 7 for interstate supplies. But this input tax claim is not mwntiined very cleary on the net.

I also have a doubt about the question,  if you have sales return for 10 lakhs previous period filed and 2 laks, i believe you can adjustments to 8 laks and provide the infomation while filing.