At this time of year, a summer vacation is on many people’s minds. If you travel for business, combining a business trip with a vacation to offset some of the cost with a tax deduction can sound appealing. But tread carefully, or you might not be eligible for the deduction you’re expecting. General rules Business travel expenses are potentially deductible if the travel is within the United States and the expenses are “ordinary and necessary” and directly related to the business. (Foreign travel expenses may also be deductible, but stricter rules apply than are discussed here.) Currently, business owners and the self-employed are potentially eligible to deduct business travel expenses. Under the Tax Cuts and Jobs Act, employees can no longer deduct such expenses. The potential deductions...