This is only relevant if you directly enter your students into your file (as the conservatoriums do). If you import them from a main database (as schools generally do), this does not apply.
Edit Details in the Debtor File
To navigate to the Debtors file, go to Home > People > Debtors.
Note that from a record in the Students file, you can go to the related Debtor using the red Debtor button.
From there, you can edit the details of the Debtor record. Note that you must select the Pencil icon to edit the details.
If the debtor is also the student, or is the Primary Contact in the Students record, you can use the yellow button on this screen to copy your updates to that record as well.
Edit Details from the Students File
The same is possible in reverse. If you update the details of the Primary Contact, there is a button that allows you to copy these details to the Debtor record.
Only use this if the Primary Contact is also the Debtor.
Merge Duplicate Debtors
If you have accidentally created two records for the same debtor, you can merge them using the Merge Debtors script found in the Settings menu.
See Merge Debtors for more detail.