In Kolkata,the best coaching options are:
Accounts:Parveen Sharma(ETEN) or Sudarshan Agarwal(live).Parveen Sharma better concept-wise and also completes both group accounts in 4 months.Sudarshan Agarwal takes 7 months.
Cost:RK Mehta(ETEN) or Prakash Saraf(live)(SSEI).RK mehta better concept-wise and also completes in 4 months.Prakash Saraf takes 7 months.
FM:RK Mehta(ETEN) or Sanjay Saraf(live)(SSEI).RK mehta better concept-wise and also completes in 4 months.Sanjay Saraf takes 6 months.
For cost-fm,there is another teacher in kolkata Manish Raj Dhandaria.DONT take coaching from him bcoz he will only make u mug up sums without explaining and will not cover all sums.
Law:Mohit Agarwal(live)(https://youtu.be/Wpd_NlyhdA8 (https://www.facebook.com/mohitagarwalclasses)or Munish Bhandari classes(Gaap bright).Preferred:First option because in theory subjects,you need time to prepare by yourself and Mohit Agarwal takes 1 class a week for 8 months giving you adequate time to prepare by yourself and gives expert knowledge on law in unique way.Also bcoz ethics communication is pure theory covering 40 marks which has to be done through icai study mat/practice manual.
DONT go for amit bachhawat for law.He only cracks jokes in the class and does not explain law properly.
TAX:For tax best teacher concept-wise is Sanjay Mundhra(prayas tax classes)(https://prayastax.com)(https://www.youtube.com/watch?v=v0gv1sorLPU .Vivek Soni is Ok-Ok bcoz his book explains provisions in simple manner,but focuses only on exam-important topics and he will make you sleep in the class.Not heard of Vikram Biyani,surely not in competition with these two teachers.Therefore,Sanjay Mundhra is suggested.
Audit:Surhi Bansal(Gaap Bright) is best,but could go for Mohit agarwal.
IT-SM:Self-study is recommended with icai study material & practice manual.