Filing a tax return is a matter of following the line-by-line instructions that come with your tax form. Each form has its own set of instructions and includes a number of charts and worksheets to help you figure out if you're eligible for credits, deductions, and exemptions.
Many major life changes, such as buying a new home, changing jobs, getting promoted, starting a business, having a child, and more, will have tax implications. But that doesn't always mean you'll owe more to the federal government.