For pre-filling the address field via URL parameters, the field code can be found under the Advanced properties.
The field code can be used along with the label names of the address fields in URL parameters, as shown below.
Here, we are pre-filling the Street address and City.
How do I pre-fill the State/Province and Postal/Zip Code fields?
The labels State/Province and Postal/Zip Code contain a / character. Since / has special meaning in URLs, you need to encode it as %2F in the URL parameter.
For example, State/Province becomes State%2FProvince and Postal/Zip Code becomes Postal%2FZip%20Code.
Alternatively, you can rename the labels to remove the / (e.g., State and Zip Code) and use them directly.