New
Functionality for Cross-Company Code Posting 
Use
With the current release the following new Travel Expenses functions are made available to you for cross-company code posting:
Cross-company document number
If you have a central Accounting System, a so-called cross-company document number is now supplied in the documents created in Accounting in the case of cross-company code posting. Thus the documents that belong to a cross-company code posting are connected. They are then recognized by the system as documents that belong to the same posting and can be considered as such in reporting.
You can find technical information on this topic in the documentation Cross-Company Document Number for Cross-Company Code Posting of Travel Expenses.
Non-deductible, separately assigned tax (NAV)
The document structure for cross-company posting of non-deductible separately assigned tax (NAV) has been improved, so that the connection between general ledger line items and tax line items on the document are now clearer.
A detailed example of posting of a simple trip can be found in the documentation New Document Structure for Cross-Company Posting of Non-Deductible, Separately Assigned Tax.
See also
The above improvements were also added in Releases 4.5 and 4.6B via notes and LCPs (Compare SAP Note 185190 regarding "Cross-Company Document Number" and SAP Note 181963 regarding "Non-deductible, separately assigned tax" (NAV)).