Purchased 2018 Premier from 3rd party seller.ebay. Used but hard disk crashed. Now need to redownload and install, don't want to purchase again. Nothing frm seller. help

[mesquitebean]

You wrote:  "ebay....Now need to redownload..."

How did you purchase a download from someone at eBay?   Only very few companies are authorized to sell TurboTax downloads, and they are big well-known ones like Amazon, Staples, Office Depot, Newegg, etc.

I don't know what the circumstances were at eBay, but the license does not allow the reselling of the software. 

This is mainly a user community forum.  You could talk to TurboTax Support, describe your situation, and plead your case, but there's no guarantee.   They may say they won't support a product from an unauthorized sale.

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 using, be sure in the dropdown menu to indicate "CD/download" and the proper operating system, then indicate which Edition.

https://support.turbotax.intuit.com/contact