Practice Manager only
Each month, it's recommended that you close the previous accounting period (month). This is so no further changes can be made to your data once you run your monthly reports and reconcile them.
You can also apply a Timesheet Lock date, which is optional. This allows you to lock off your data mid month if you run weekly or fortnightly reports. This stops changes to your data inclusive of your lock date.
If receipts haven't been allocated to the correct invoice(s) in prior months, you may be able to reopen the accounting period to correct allocation issues.