It's good to see you here in the Intuit Community, Chri55y,
Let me help share information on how to add the shipping address to an Estimate.
To start, let's make sure that Shipping feature is turned ON. Here's how:
Once done, create an Estimate.
That's it! you're now able to add the shipping address to an Estimate.
If there's anything else you need help with, please let me know. I'd be happy to help. Have a great day!