If you registered as a member of one of the supported churches when you registered at your Gemeinde, then you are considered a member and will be liable for the church tax.

If you no longer wish to be considered a member of that church while you live in Switzerland, to get off the membership (and tax) role, you need to fill out a 'Kirchenaustritt' form or write a letter stating your decision.

You can read about the steps here:
https://frei-denken.ch/kirchenaustritt

There is a site that says it is the official Kirchenaustritt, be aware that there is a cost:
https://kirchenaustritt.ch/?gclid=Cj...RoC34gQAvD_BwE

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If you did not register as a member of one of the supported churches when you moved to Switzerland - that is, registered as Konfessionlos or as a member of a non-supported church - you are not liable for the church tax. This regardless of your whether you were baptised into (or wish to practice) your religion elsewhere.

Generally speaking, if you were baptised in another country, your leaving (or not joining) a Swiss church has no bearing on your relationship with your church outside Switzerland. So no need to write you parish at home, your decision to join, not join, or leave a supported Swiss church is between you and the Big Guy Upstairs.

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We've had many threads discussing this that go into more detail, a search for 'Kirchenaustritt' should bring these up.


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Now back to church bells.