Hi Diana,
Try doing a return dated the day before the day you want to start as your new reporting period. That should catch all those old items and if everything was posted correctly then it should generate a zero dollar return for you to record. If it generates a return with a balance, record it anyway to clear those old items in the system and then you can review the "dummy" return with your accountant to decide on the correct adjusting entry required at year-end.
