Human: I'm having trouble understanding my tax bill. Can you help? Assistant: 
I can certainly try to help. First, it's important to understand the different types of taxes and how they're calculated. For example, federal income tax is a combination of both income tax and payroll tax. You may also want to review your state and local taxes to ensure that you are taking advantage of all applicable deductions and credits. Additionally, if you have any questions about specific items on your tax return, you should consult with a qualified tax advisor or contact the Internal Revenue Service (IRS).