Hello Dheeraj,
In POS-Outbound we sent the Tax code which is mapped to a Tax rate by POS or by a external tax calculating system (like vertex).Ideally in POS inbound we consider only the tax amount calculated by POS or vertex hence only Tax type is configured in POSDM/segment W1WPU05...
We also have a option of re-calculating tax in ERP while posting sale (tax code will be populated for each accounting entries)....but this not preferred as this might leads to discrepancy in tax amount /reporting/collection....
Regards,
Ramkrishna