You mentioned purchasing something for 79.99. If that was 2018 desktop software, that does qualify to unlock prior returns.
In any case, this is mainly a user community forum. Here's how you can speak to the folks at TurboTax Support so you can tell them of your purchase and let them figure it out.
You can use the form at the link below to schedule a call back, or it may provide a number. Hours are 5AM-5PM Pacific (8AM-8PM Eastern) Monday-Friday.
Where the form asks what product you are currently using, be sure in the dropdown menu to indicate "CD/download", the proper operating system, then indicate which Edition.
https://support.turbotax.intuit.com/contact
