✅Answer: Please consider the following narrations:

عَنْ مُحَمَّدِ بْنِ یَحْیَی عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ فَضَّالٍ عَنْ عَلِیِّ بْنِ عُقْبَةَ عَنْ بُرَیْدٍ الْعِجْلِیِّ عَنْ أَبِی عَبْدِ اللَّهِ قَالَ لِصَاحِبِ الْوَصِیَّةِ أَنْ یَرْجِعَ فِیهَا وَ یُحْدِثَ فِی وَصِیَّتِهِ مَا دَامَ حَیّاً

📚Kafi, Vol. 7, p. 12

Imam Sadiq (AS) said: The person who made the will can change it as long as they are alive, and they can also add new instructions to it.

✅Note: Imam Baqir (AS) said: A will is a right, and certainly, the Messenger of Allah (PBUH) made a will, so it is appropriate for every Muslim to make a will.

📚Kafi, Vol. 7, p. 3

✅By learning the rules and conditions of a will, let us fulfill this right accordingly.

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْر