I am trying to create a button that will create a new record related to the record I am on. The issue is that I cannot get the lookup relationship from the related to master to populate on default like it does with the standard related list new button. This is what I have right now any thoughts or ideas on how to update this so it will work properly?
{!URLFOR($Action.Sales_History__c.New, null, [Account_Name__c=Id])}