If you want to stop transaction being changed after a certain date in Chintaro, go to System Maintenance> Preferences> Finance:

Go to the Close Period field. When you click in the field, you will see that this preference allows you to enter a date to lock financial transactions prior to, and including this date.

Enter the date you wish to lock the transactions at (EG 01/07/2016):

Exiting the screen will save.

NOTE: The System Administrator is able to reopen the period at any time, by going back to System Maintenance> Preferences> Finance> Close Period, and entering a date in the past. If the period is reopened, it is crucial that you go back to Preferences> Finance and lock it again (by entering a date) once you have completed what you need to do when the period was open.