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Form 1040 - where to place my stipend?
Some of the 45,000 might be taxable. The question is how was the stipend determined. Was it based on the days away? The mile driven? The cities you worked in? The IRS has guidelines regarding what is taxable in  IRS Pub 15 Per diem or other fixed allowance.  You may reimburse your employees by travel days, miles, or some other   fixed allowance under the applicable revenue procedure. In these   cases, your employee is considered to have accounted to you if your   reimbursement doesn't exceed rates established by the Federal   Government. The 2015 standard mileage rate for auto expenses was 57.5   cents per mile. The rate for 2016 is 54 cents per mile. The government per diem rates for meals and lodging in the continental   United States can be found by visiting the U.S. General Services   Administration website at www.GSA.gov and entering "per diem rates" in   the search box. Other than the amount of these expenses, your   employees' business expenses must be substantiated (for example, the   business purpose of the travel or the number of business miles   driven). For information on substantiation methods, see Pub. 463. If the per diem or allowance paid exceeds the amounts substantiated,   you must report the excess amount as wages. This excess amount is   subject to income tax with-holding and payment of social security,   Medicare, and FUTA taxes. Show the amount equal to the substantiated   amount (for example, the nontaxable portion) in box 12 of Form W-2   using code “L"