Urgent: treatment for provision for bad debts under mat

Yes, you can reduce the actual bad debts reversed while computing book profits under section 115JB.  Refer Explanation 1 to section 115JB (Amount withdrawn from reserves or provisions, if the same had been added back for computing book profit in an earlier year)

Thank You.

One more question while making provision for bad debts We should add back it for calculating 'Book Profit'. It is because of 'Provision made for unascertained liabilities' OR 'Provision for dimunition in value of any asset'.?