Generally, the Illinois Department of Revenue follows the IRS guidelines for verifying business income and expenses. The Governor's Office of Management and Budget must approve all out of State travel requests, even if there is no cost to the State of Illinois.Start Date: Enter the initial date of travel. End Date: Enter the return date of travel. When travelling for business purposes, not only the transporation portion is deductible, but also lodging while away as well as meals. An individual can't deduct the cost of traveling between their main place of business or work and their residence. If you're traveling specifically for business purposes, there's a good chance your expenses are tax deductible. The current form can be found under the forms tab above. A sample filledin Business Expense Reimbursement Form is located in the appendix. Employees can also pay for travel expenses with a personal credit card and then request reimbursement after travel is completed.