5 simple steps to use the WooCommerce Checkout Address Autofill Plugin.
Step 1. Install the Plugin with the download .zip file provided directly after purchase:
Step 2. Active the Plugin and go to Woocommerce -> Checkout Autofill
Step 3. Register for a 100% FREE account at SmartStreets API
Step 4. Navigate to the API Keys page and add your domain and generate and auth ID if one wasn’t automatically created:
Step 5. Enter your Auth Token into the Auth field in Woocommerce -> Checkout Autofill
Your Woocommerce website will now automatically fill out the address details when a valid zip code is entered upon checkout.