All of the expenses you listed are deductible. Where they are entered on your return depend upon whether they were spent on his self-employment or for his job as an employee.
To enter your travel, vehicle mileage, supplies and other common business expenses:
· Type “Schedule C” in the Search box.
· Select the “Jump to” link.
· Select Add expenses for this work (or Edit and navigate down to Business Expenses).
Remember to enter 1099-MISC, 1099-K, cash, and personal check income from your self-employment before you associate any expenses with your business.
If the mileage and expenses were not as a self-employed, but a W-2 employee instead, follow these links for the employee home office deduction and job-related employee expenses.
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