Hi Avi,
This is the following process normally we follow for Travel Mngt. However, it depends on client to client.
1. Create the travel request (TRIP) (Request Recorded)
2. Approval of trip
3. Settlement of Trip data
4. FI Posting
Following points needs to be followed to transfer Expenses to Payroll:
1. Set up feature TRVPA for trip costs parameters
2. Assign Wage Types to Travel Expense Types for Individual Receipts: V_T706B4
3. WT to Symbolic Account Assignment for Financial Accounting: V_T706K
Thanks'
Gautam