You do not need to upgrade to the Plus edition to e-file your tax return. A tax return can be e-filed with the Free edition unless you have entered some tax data that is not supported by the Free edition.
Please see the TurboTax FAQ below for instructions that will help you upgrade your version:
If you have already filed your 2018 tax return using the Free Edition without PLUS, then you need to upgrade to PLUS and pay first to access your prior year return. Please follow the instructions below:
1. Login to TurboTax.com
2. On the Tax Home screen click "show" to see all your tax returns & documents.
3. Under 2018 click on "Add a State." (We are not actually adding a state, but need to get back to the page to upgrade to PLUS.)
4. Click "upgrade" on from the left menu. (If it is greyed out, you already upgraded and can close out of there.)
5. Now, click on "Tax Tools" from the left menu.
6. Click "Print Center."
7. Select "Print This year's Return." (Not Prior year's return or you will get knocked out of the return.)
8. Click "Pay Now" to pay for PLUS to access the prior year's return.
Alternatively, if you have not already filed your 2018 tax return, then click on the appropriate link below for further instructions.
· I haven't started a 2018 return yet
· I started a 2018 return but haven't filed it yet