You can pre-fill Formyoula forms using Salesforce Lookup fields or URL merge fields when directly launching the forms.

Please see the following guide on how to pre-fill Formyoula forms using Salesforce Lookup fields -http://support.formyoula.com/knowledgebase/articles/404713-pre-fill-formyoula-forms-with-salesforce-informati

Please see the following guide on how to pre-fill Formyoula forms using URL merge parameters -http://support.formyoula.com/knowledgebase/articles/939786-how-to-pre-fill-fields-from-salesforce-using-url-m