Notice u/s 143(1)(a) relating to schedule mat

-I have received notice u/s 143(1)(a). It says "In Schedule MAT there is an inconsistency in the computation of Book profit from the amounts mentioned in Part A P and L account".

- The amount specified in notice is rs. 31986. which relates to "Provision for deferred tax and deferred liability".

-While filing ITR-6, I have shown Profit after tax(-1401217) in schedule MAT and Rs. 31986 as Provision for deferred tax and deferred liability.

- Please suggest how to respond to this notice.