Sir,
According to Section 2 (19) of CGST Act, 2017 “capital goods” means goods, the value of which is capitalised in the books of account of the person claiming the input tax credit and which are used or intended to be used in the course or furtherance of business.
According to Section 2 (47) of CGST Act, 2017 “exempt supply” means supply of any goods or services or both which attracts nil rate of tax or which may be wholly exempt from tax under section 11, or under section 6 of the Integrated Goods and Services Tax Act, and includes non-taxable supply;
According to Section 17 (5) (a) of CGST Act, 2017
input tax credit shall not be available in respect of the following, namely :-
[(a) motor vehicles for transportation of persons having approved seating capacity of not more than thirteen persons (including the driver), except when they are used for making the following taxable supplies, namely :-
(A) further supply of such motor vehicles; or
(B) transportation of passengers; or
(C) imparting training on driving such motor vehicles.
However GTA service is not exempt service. In respect of GTA Service you can pay gst @5% without ITC and @12% with ITC. Therefore the question of reversal of ITC does not arise in your case.