You must render unto Caesar what is required by law.
render unto Caesar
idiomTo give (something) to one's state or government, especially in the form of a tax payment.
Origin
disputed originFrom the Holy Bible (Matthew, 22:21): Then he said to them, “Render therefore unto Caesar the things which are Caesar's; and unto God the things that are God's.” (KJV; spelling modernized)
Even if you dislike the current tax policy, you still have to render unto Caesar every April.
The merchant grumbled about the high tariffs, yet he knew he must render unto Caesar his fair share to keep his business operating legally.