Companies have to pay minimum alternate tax in India (MAT) .Section 115JAA of the Income Tax Act provides that when t MAT tax paid u/s 115JB is more than actual tax liability as per Income Tax Act, the extra amount of MAT paid can be carried forward for next 10 assessment years as MAT credit . You can read more about the mat credit meaning in article titled MAT Credit u/s 115JAA Simplified ! .
In case the time period for adjusting the available MAT credit is lapsing , one can follow the tax planning method for saving the benefit to be lapsed . Its simple !