How do I tell my parents I don't want to go to church?

Tell them straight up, I realized I didn't share my parents beliefs on religion and I told them. They were a little shocked at first but slowly they got used to it.

Explain to them your reasons and if they are good parents they should understand. You have your reasons and opinions and they should respect those.

you can always tell them that you respectfully decline to go to church because its not something you (want to do/believe in)

This can be difficult based on the scenario you are in, and it can be a touchy subject if not answered correctly. The best thing to do is first, be honest with yourself. Do not use a reason like football, or going to brunch with your friends. Explain to your parents that while you may be religious, it is just something you do not feel comfortable doing, or whatever the reason may be. But make sure when you talk about it you use real reasons that depict why you do not want to go.

I believe instead of telling that you don't wanna go to church , you should focus on why you don't want to go to church. If you emphasize on the problem maybe they can help you or maybe they will understand.

Well, the religion that you participate in is your choice, but you cannot be harsh or rude when speaking about someone else's religion, so be gentle, be rational and try to keep an open mind.

Tell them honestly why you don't want to go. Try going one more time and explain why it's not for you.

Just consider why you don't want to go. Then sit down with your parents and have an open-ended, non-aggressive discussion about why you don't want to go.

When one faces the probable cycle of having doubt in their own ability to fit the norms presented to them by their parents, they must realize that their ability to independently rationalize is of the utmost importance. For this reason, one must be bold, daring, and decisive in making a choice and explain to the authority of the parent that they are their own independent person.

Tell them that you want to do something because you want to- not because they would say you need to or you have to.