Start with the IRS website to educate yourself on taxes. There's a link to Free File where you can learn about your options. Give it some personal info and it will tell you which software is best for you.
Free File Alliance is a nonprofit coalition of industry-leading tax software companies partnered with the IRS to help millions of Americans prepare and e-file their federal tax returns for free.
The IRS offers a volunteer income tax assistance program. The program is available to people who earn less than $56,000 a year, have a disability, or do not speak English as a first language.