Forgot itc of jul bill in 3b - can i add it in aug 3b?

So how will difference in amount between 3B and GSTR 2 be refunded?

Whats harm if I claim it in August 3B?

If I dont claim in August 3B then that difference will always show every month in 3B ledger and GSTR 2 ledger

If I show it in August 3B then difference will be there in July only but after August GSTR 2 both will be equal.

There is no clarity