A professionally designed course to learn TDL

I am Samir, I am working as IT expert last 10 years, I am selling tally from last 5 years. but i didnot work with customisation, because it is very tough to understand the customer requirement. but i taken the course of Tally nine. Now i am able to understatnd the customer requirement in customization as well as i am able to start the customisation. The course is design very professionly. Mahendra sir is giving excellent support  to get training. Thanks