Input VAT on Capital Goods

Sir/ Madam,

Regarding Tamilnadu VAT

1. Input VAT on capital Goods which rate can we avail whether 4% or 12.5%.

2. In TN -VAT Pamphlet No.03 Reg. ITC on C.Goods they mentioned in the part of What is required by the Dealers is

Input Tax credit availed- First year (not exceeding 50%) Second & Third year (the remaining.

My query is First year means whether Financial year(from date of purchase to end of the Financial year  or the completion of One year from the date of Purchase.

Please guide me