Many companies with PoS usually deposit all the cash obtained in a day to their bank. 

All cash out / in from the PoS go to the bank suspense account that is configured in the Cash journal. We have to reconcile this cash out with a bank statement to avoid a transfer from the cash journal to the bank journal.

To do this simple, we need to configure our suspense account in our Cash journal.

The account needs to allow reconciliation.

We need to go to the PoS and make our cash out.

Then, we need to close the session.

If we go to the session in PoS / Sessions, we will see the cash out and the amount in the chatter.

If we go to the Cash Register, we will see one line for the sales and other for the Cash out with the label posted in the comment. This line will be unreconciled, so we need to manually reconcile it with our bank statement. 

We need to create our bank statement, that will have the line from the deposit.

In Miscellaneous Matching we will find the line for the Cash out for the reconciliation.

We have to go back to the Cash Register and Validate the Cash statement.

After all of this, we can check the General ledger to check the balance in the Bank account.