If the GL transactions have already been posted, your only option is to enter 2 adjusting journal entry transactions – one to reverse from period 6 and one to enter in period 7.  The easiest way to do this is as follows:

1.  From the Reporting System, General Ledger Reports – run a Transaction Journal with the following parameters (make sure you choose summary for GLAccount.)

2.  Using the Summary, enter an adjusting journal entry to Period 6 that is the “REVERSE” of the debits and credits shown on the summary.  Save and post.

3.  After saving and posting transaction entered in step 2, call that transaction back up in the GL Entry/Edit window and choose TOOLS, Reverse Transaction.

4.  Make sure the “NEW” transaction is set for Period 7 and save (save and post if you are in period 7 in GL).