Visit the IRS contact page to find tools and resources that cover a variety of tax-related topics. Or call the IRS to speak with a representative. If not, or if you have any questions or concerns, you should contact the IRS directly by phone or in person. You can get answers to a lot of questions about taxes, but only if it turns out that your question is a question that the IRS has addressed on site.
You'll need to call the IRS if you want to ask a human being a question, but take a deep breath first. There are many ways to contact the IRS, and the right one depends on the exact request or question you have, as well as your level of comfort with technology.