Adjusting a beginning balance on an activity At the school level, you can adjust the beginning balance of an activity. Select Manage Schools. Open a school record. On the Activities tab, open a detailed activity account for which to adjust the balance. In the Period Activity Balances tab, select Actions > Adjust Beginning Balance. Specify the amount by which to adjust the beginning balance. You can use a positive or negative amount. If there is a GL account on the activity, you can specify the amount by which to adjust the posted beginning balance. Click Submit.