In accepting a travel advance, the employee must submit a State of. Maryland Expense Account Reimbursement form, Appendix 5 to the DJS.No expenses can be claimed without Receipt. Else the Amount reimbursed, technically is taxable. Any unused portion of the qualified expenses may not be carried over to another taxable year. Per diem is an allowance for lodging, meals, and incidental expenses. The US General Services Administration (GSA) establishes the per diem reimbursement rates. Business travel expenses can save you money at tax time! Learn about deductible travel expense rules and maximize your savings today. Reimbursement Procedure.