Have you ever asked yourself what would happen if everyone had your attitude? Over time, tax revenues would go down, and even essential services would have to be cut. Eventually, taxes would have to be raised to make up for the lost revenue.
But the main reason the Bible commands us not to cheat on our taxes is because God wants us to be honest and above board in everything we do. If you cheated someone out of what you owed them, you'd rightly be branded a thief. Why is it any different if you owe money to a company or to the government?
After all, Jesus paid the taxes He owed; why should we do any less? When asked if He intended to pay a certain tax that He owed, Jesus immediately handed over the required coin (taken miraculously from a fish caught by one of His disciples). He knew it might be wasted or used in wrong ways, but that didn't keep Him from fulfilling His obligation. He said, "Take it and give it to them for my tax and yours" (Matthew 17:27).
I can't help but wonder, however, if the real issue you face isn't simply taxes, but your whole attitude toward money -- and toward God. Don't let greed, or cynicism, or anything else rule your life. Instead, submit your life to Christ, who alone is worthy of your allegiance.