Amazon might replace a damaged CD, but I doubt as a download. They do their own pricing, and their CDs and downloads may be priced differently. You could see what they suggest.
If you can't get relief from Amazon, here's how to contact TurboTax Support. They will ensure you get usable product, likely a download.
In any case TurboTax has an unconditional satisfaction guarantee for a product refund within the first 60 days.
If you end up needing to speak to TurboTax Support, use the form at the link below to schedule a call back, or it may provide a number. Hours are 5AM-9PM Pacific (8AM-12 Midnight Eastern) 7 days/week.
https://support.turbotax.intuit.com/contact
