Salesforce module provides you with the ability to select "State and Country Picklists" option. It changes the country and state fields in Salesforce to leverage "drop down" form fields
IMPORTANT: If your Salesforce org is configured to use/not use these picklists, you will also need to activate/disable their usage in Magento via Salesforce configuration
Case1. "State and Country Picklists" option is set to "Disable" in Magento
Go to Magento Admin panel - click Salesforce (on left side bar) - General Configuration - Advanced tab
2. Set "State and Country Picklists" option to "Disable" and Save Config
The picklist is disabled in Salesforce result
Case2. "State and Country Picklists" option is set to "Enable" in Magento
Go to Magento Admin panel - click Salesforce (on left side bar) - General Configuration - Advanced tab
2. Set "State and Country Picklists" option to "Enable" and Save Config