Intially made a thorough check with the sales department to reconcile that all the receipts for the periods has been entered
Check the revenue account(Bank) with the Sales day book
Assume that all receipts for the period has been received
Reconcile with the bank statement with the receipts entered
Adjust the Bank charges or discount given to the customers appropriately.
Run the import journal from AR to the GL
If the report has run successfully then check the transaction at GL posting header.
Once it has been posted you can close the AR for the period.