The Mormon religion cannot be true since it rests on a false view of God. The LDS god, while a man, and even in his god-state, does not predetermine all things (there are many other gods above him; gods who progressed before him; and there are gods that are alongside of him). The Mormon deity does not hold all things together, thus he does not know all possible contingencies, and thus he can speak lies and tell falsehoods. He may, through misconstruing issues, misconceptions, misunderstandings, and misinterpretations, assert that which is false.
The Most High God can never fall into misconceptions, misunderstandings, and misinterpretations since he knows all things and all contingencies. Considering the LDS god can lie, he is not the God of the Bible, ergo he does not exist.

As man is, God once was; As God is, man may become. (Mormon motto: Mormon apostle Lorenzo Snow).
The Mormon may try to deny that his god can presently lie, nonetheless before he progressed into a god the Mormon god was a man and lied in the past as a fallible man.
• The LDS god has lied as a mere man in the past and can tell lies in the future
• The true God cannot lie
• The LDS god is not the true God
• All false gods do not exist
• The LDS god does not exist.
Misconceptions, Misunderstandings, and Misinterpretations
If the god of Mormonism actually existed, he would be ignorant of many things. The lack of complete and perfect knowledge results in misconceptions, misunderstandings, and misinterpretations (just ask any married couple). The triune God transcends time and knows perfectly the past, present, and future. He cannot be surprised by anything and nothing can catch Him off guard. The Most High God, because of His transcendent and perfect perspective, can never stumble into any misconceptions, misunderstandings, or misinterpretations. Not so with the LDS take on their god. The LDS deity, as one who has made mistakes and missteps in the past as a mere human, and presently is limited in space and time, fails to observe and know all things and all possible contingencies. Another problem arises with this god considering he cannot know the past perfectly: for in the past he was just a man. He could not see and understand the past with “equal vividness” as he does the present. The Almighty God has perfect knowledge of the past, present, and future.
The Biblical God has complete and flawless knowledge (Job 11:11, 21:22; James 1:4) and perfect understanding (Job 37:16); this rules out the Mormon notion of God the Father progressing into a god. The true God has infinite knowledge (Psalms 147:5) and unchanging intent (Numbers 23:19; 1 Samuel 15:29; Malachi 3:6) and possesses certain and absolute understanding and intent (1 Corinthians 14:33; Job 39:18; Amos 5:5). The Mormon version of deity changes and advances into godhood. This clearly demonstrates that the Mormon deity is false due to the fact that in time past, the Mormon God was only a man. Therefore, He was not all-knowing at that moment in his existence. Thereupon He could not have all knowledge then: consequently, He cannot have all knowledge now. And as a mere man he cannot even be a God since he cannot have knowledge of all things at all times. He lacks the knowledge of knowing all things in the past during those particular time periods. Thus the Mormon god is not omniscient, hence he is not God.
Additionally, the Mormon view of deity also could not have complete foreknowledge of future events (before he woke up one day as god). The Bible rebukes the unholy thought that God could ever have been like fallen man. “These things you have done, and I kept silent; You thought that I was altogether like you; but I will rebuke you, and set them in order before your eyes” (Psalms 50:21). God does not play religious games and detests the doctrines that attempt to lower His being, and exalt sinful men. It is impossible for men to ever understand as God does. This alone refutes the doctrine of men progressing to godhood.
“Have you not known? Have you not heard? The everlasting God, the LORD, the Creator of the ends of the earth, neither faints nor is weary. His understanding is unsearchable” (Isaiah 40:28).
see the Presuppositional Apologetics book that Refutes Mormonism HERE