Clarifications in availing the ITC

within the same month if you have invoice of JULY month so take input on such invoice in the JULY month 

Upto next GST audit. Which we have to conduct within 6 monthes from the date of year ending. Main condition is the goods should in your possession along with invoice. Material should not be in transit. 

Have you matched your GSTR2 with GSTR2A? Then you may find which invoices you have received and which is not received. Not received invoices you can accept if you are sure this is your invoices or keep pending till you receive the invoice.