where do I find my redemption code?

I'm not sure of what you mean by redemption code.

• Your license code should be included in your order confirmation email if purchased on a retailer's website, or within the package if purchased in-store. Check your email or your order history. If it's not there, please contact TurboTax Customer Support.

Did you buy the Desktop program?  Where did you buy it?   Where to find the License Code
https://ttlc.intuit.com/community/tax-topics/help/i-can-t-find-my-license-code/01/852973

How to get started with the Desktop program, install and activate it
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/download-software-turbotax-com/L7u9oLEkq_US_en_US?uid=luqgvzrd