This is a good link to learn How to create free text invoice and make intrest note against FTI then than settle the payment against the interest and interest fee in Dynamics Ax 2012. http://codingchamp.blogspot.in/2012/08/how-to-create-free-text-invoice-and.html
Technical Tutorials x++,tips on issues or troubleshooting On Ax ERP ,Microsoft Dynamics 365,Ax 2012,Microsoft , U.S.,Business Software solution.