22B > Create AR Miscellaneous Receipt > Tax Rate Code Default from Receivables Activity?

Hi - a customer I support is using 22B.

I wanted to check something - they have many Receivables Activities set up, and those all contain an Asset Tax Rate Code (e.g. GB OUT OF SCOPE) and a Liability Tax Rate Code.

When they create a new Miscellaneous Receipt, and select the Receivables Activity - is it the case that the Tax Rate Code on the Misc. Receipt would be populated from one of the Tax Rate Codes defined against the Receivables Activity?

That's not happening, but I've been told it used to happen, but I don't know what might control this functionality.