You can but you don't have to report the union dues; they are part of your itemized deductions. If you are not itemizing (have mortgage interest, real estate tax, state income tax, charity, etc.), the dues deduction will not make a difference on our tax return. The data entry is as follows:

1. Federal Taxes
2. Deductions & Credits (you may have to select See all tax breaks)
3. Employment Expenses
4. Job-Expenses for W2 Income