Do you mean W-2 (not W-4)?
The TurboTax (TT) free filing option ends Oct. 15 of the filing year (10-15-19 for tax year 2018). It's too late to file free, or even electronically.
If you want to use TurboTax, you will need to purchase the Desktop Version for each year that you need to file. You can do that at this link:
http://shop.turbotax.intuit.com/personal-taxes/past-years-products.jsp
You can download the Forms and Instructions free from the IRS web site at this link:
http://www.irs.gov/app/picklist/list/priorFormPublication.html
A return with only one W-2 should be simple enough to do by hand. If you are required to file a federal return, you may also have to file a state return, if you live in a state with an income tax (41 out of 50).
