Normally, the tax office responsible for your accepting your taxes is selected according to your actual residential address. This also applies in situations where you are not yet registered there.
The tax office is automatically selected in our tool according to the postal code you entered - you should maintain this. The only exceptions are if the tax office has advised you to submit your tax return to another tax office upon their request.
Should you no longer reside in Germany, then the tax office is determined by the address of your last German place of residence.
You can find out which tax office is responsible for your tax return. Just enter the postal code (last German one) from your last address.