The Travel Expense Voucher (form A20A or A202A) is used to: • Document the authorization for travel within the state of Washington. Travel expenses should be submitted within 15 days of the trip's completion.For tax purposes, travel expenses are the ordinary and necessary expenses of traveling away from home for your business, profession, or job. Most expenses require a receipt. All receipts must show details of the item or service being paid for, date, and proof of payment. Travel considered entirely for business. Exception 1—No substantial control. Expense Reports must be submitted within 60 days after conclusion of trip or purchase. New Transportation Expense Report Fields FAQS. Receipts. After submitting an expense report, a questionnaire will appear to fill out regarding personal time.