Will we have free will in Heaven?
To answer your question, I will remind you of our Lord's prayer that he taught us. Our Lord taught us how to pray and what to pray for:
"Our Father in heaven, Hallowed be Your name. Your kingdom come. Your will be done On earth as it is in heaven..." (Matthew 6:9-13; Luke 11:2-4).By our own free will, we choose to submit our will to God. When we submit our will to God, it is to our own loving Father. God's will is to give you life. He gave you life here on earth, and His will is to give you eternal life in His kingdom in heaven. "I have come that they may have life, and that they may have it more abundantly" (John 10:10).
You may want to ask that if there is free will in heaven, is there any chance to sin. Actually no; because in heaven we will be fully adopted and as St. John said, "We know that whoever is born of God does not sin; but he who has been born of God keeps himself, and the wicked one does not touch him" (1 John 5:18).