Subledger Accounting - merging Item and Non-Recoverable Tax

 Tax is Non-Recoverable.  Client wants the Item and Tax to be merged into a single Journal Line in GL, However, where there is more than one invoice line posted to the same account code combination, they want separate journal lines in GL!

I have tried various combinations of summarisation and transfer to GL but can't achieve their requirement.  I have tried using inclusive tax in e-Business Tax, but it still creates a separate tax distribution.

Is there anyway to create either a tax inclusive line type or merge the tax and item lines?