Hi phuongtholt,
To get your Uber driver partner discount, please ensure you go to your Uber driver dashboard first, then click on Tax Information, then click on the TurboTax offer. From there, you'll be taken to a TurboTax + Uber website just for Uber drivers. The free offer only applies to TurboTax Self-Employed federal, or you can get 50% off TurboTax Live Self-Employed federal. Your discount will be reflected in your cart at checkout.
https://ttlc.intuit.com/questions/4237789-why-isn-t-my-lyft-discount-being-applied-to-my-turbotax-account