Please give me simple steps what is the best way I can make my dad and mom’s Barzakh safar easy and what are the steps for qaza namaz for parents and myself.

You can do various kinds of good on their behalf, such as prayer and fasting if they are required to make up for prayer or fasting, as well as to give alms on their behalf, read the Qur’an for them, visit their graves, perform Hajj and perform Umrah on their behalf, and always supplicate for them, and ask God Almighty Forgive them and make them dwell in heaven.