Install Pataa App from Shopify App Store
Use the below mentioned link to install pataa autofill app
Genrate API by clicking on this link
Once installed, you need to click on the Activate Plugin link to start using the plugin. You would have to configure the settings; for that you need to click on Address Autofill
There you will see a page like below where you need to put the API Key and the business type to complete the settings.
Now Inject a div into your cart page
<div class="pataa-input-main pataa_mini"></div>