You can deduct a part of your medical and dental expenses, and amounts you paid for certain taxes, interest, contributions, and other expenses. Navigate to the Travel Request that was submitted and approved prior to the trip.This form is not required to complete your expense report but your agency may request it. Before incurring expenses, employees fill out a form, specifying their travel dates, destination, and the expected amount of transport and accommodation costs. Click on the "nightly lodging expenses" tab. From the receipt, fill in the room rate, and room taxes fields. Edu) is used to request travel expenses that need to be purchased prior to the travel event. THE COMPLETE GUIDE TO. DEDUCTING BUSINESS TRAVEL EXPENSES. INTRODUCTION. Deductions. Chrome River is the University of Illinois System's travel and expense management tool. Chrome River includes a lot of user-friendly features.