How can I update wrongly defined tax box values?

Summary:

Need to update wrongly defined tax box values

Content (please ensure you mask any confidential information):

Need to update wrongly defined tax box values, but I can't. I did the whole setup and used it already.

However, the box allocation should be changed.
How can I do this?

I cannot edit or delete the tax condition sets , in order to recreate…

Please provide your suggestions.

Kind regards,
Elena

Version (include the version you are using, if applicable):

26B
Code Snippet (add any code snippets that support your topic, if applicable):