Can I get/find a TurboTax service code?

Service codes are issued by customer support for very specific reasons--not just to give you a discount.

https://ttlc.intuit.com/community/charges-and-fees/help/what-is-a-service-code/00/25646

Service codes are only issued by TurboTax support for very specific reasons.  Or from TurboTax partners.

See this TurboTax support FAQ for service codes - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-account-billing/enter-service-code/L5hWeDkAa_US_en_US?uid=m6b8m3xp