Dear Sweta for Direct Tax you can take coaching of a famous and no.1 teacher in Direct tax and his name is CA Vinod Gupta he is Rank.1 teacher for teaching Direct tax and his website is : http://www.vinodguptaclasses.com/
and for IDT No.1 Teacher is CA Deepak Gupta and No.2 CA Rajkumar and then CA Manoj Batra
and all these teacher are available in laxmi nagar and south delhi through satellite classess.
Dear Sweta paraag gupta & Vinod Gupta sir is teaching all the level of Students whether they are doing CA CS CWA. so dont worry about that they have the seprate batchs for CMA students so you may contact them. and here i am sending you the Link of Dani sir from where you can see the online costing vedio of CA inter and final level and mostly topics of CMA and CA are common so check this vedios very usefull for you and you have not mentioned that u are doing inter of final of CMA..?