You can change your will as many times as you want. It is possible to make changes to your will even if it’s been registered.
Ideally, if you are making substantive changes to a will in order to convey your wishes properly, you should execute a codicil. A codicil is a written statement which supplements or modifies an existing will. It must be executed in the same manner as that of the original will.
You can also make changes by deleting, modifying or inserting new language in a will, you should sign and get the signature of the witnesses in the margins near the changes or at the end of the will by making a reference to the changes. No other changes can be made to an already executed will (unless it has been made to make it clear or legible).