If you add anything to the property, you can add it to the Dep Schedule. There are clients who get in touch with us every year and get us to add things like hot water heaters, air cons, carpet, kitchen renos etc etc.
I sort of see a Dep Schedule as a 'living document'.
Of course, we also send the Dep Schedule as a CSV file to accountants who request it. That indicates they are uploading it to their own software and will take care of changes going forward. You would just give them costs for stuff you have done.