Offset Taxes on AR transactions?

A colleague of mine recently called me to ask how to setup offset taxes for receivables. I had never come across the requirement before so I was interested to find out why the request came about and it turned out that they only needed it for reporting purposes. So it would be interesting to find out if anyone else has had a similar requirement and if so why? And what other solutions are available for using taxes for reporting only in AR. There is a ‘reporting only’ tax option that can be setup when creating a Tax but this is used for AP purposes only.