If, as you say, God, being sovereign, omnipotent, and omniscient, creates us, knowing what each of us is going to do and knows how it is all going to turn out, where is the freewill? Don’t we have to do as He has planned for us? How do you know you could have made different choices?
We don't have to do anything, we have freewill.
Now, just because God knew all the moves you were going to make from the time you woke up this morning, does not mean that you necessarly did what He wanted you to do. Maybe you chose to smoke three packs of cigarettes which carved some time off your life, or maybe you chose to sit in your living room and drink four bottles of gin, and after you drank the gin, maybe you chose to get in your car and in the process of you driving drunk, you mowed over a day care class crossing the street on their way to get ice cream. Now do you think that that's what God wanted you to do? But He didn't do anything to stop you, did He? He didn't because when He made you He gave you free will because it was never His intention to create robots.
And no, you don't have to do as He has planned for you. He does not force Himself on anyone. He gave man the opportunity to have a relationship with Him, and be forgiven and cleansed of sin, and spend eternity with Him, and yes, live the life that God has planned for him. But He does not force man to accept Him, or obey Him, or love Him. At the same time, He knows what choices we will make and the outcome and the consequences of those choices. And like a good Father, He doesn't always step in to fix our screw-ups.
How do you know you could have made different choices? Well, after you sobered up immediately after hitting the day care class, you would know that you could have made a different choice. Every single day, we come to forks in the road and choose which way we go. And once a person gets to a certain age, he can reasonably gauge what choices are wise and which aren't. We make our choices and we are responsible for what happens as a result.