After you have finished your tax return, you can file your taxes in one of two ways: by mail or by selecting the e-file feature. The filing date is usually April 15th. If you owe any money, you may need to file your taxes and send in your owed taxes to separate locations. Use the Lookup Tool to help you choose a Free File offer to file your taxes for free online. Just answer a few simple questions about income, age, and state residence to find out which offer(s) is available for you.