To file a 2018 tax return using TurboTax, you must buy, download and install on your computer the 2018 program: https://turbotax.intuit.com/personal-taxes/past-years-products/
A 2018 tax return must be printed and mailed. It can't be efiled. You must print and mail it yourself. Use the filing instructions that print with your return for what to include and where to mail it.
