Hash code .xml

I need to creat a xml hash code to have an AT certification in my country

What has this got to do with Manager.io accounting software?

It is a certification requirement in the tax authority

You need to furnish information about the requirement, such as a link to an official, English language government document. This may also be something that has to be implemented with the new Extensions feature. Search the forum for “Extensions” to read about that.

Ok thanks