You cannot claim both ITC and depreciation on the GST component of capital goods. Per Section 16(3) of the CGST Act, if you claim depreciation on the tax portion of an asset under the Income Tax Act, you forfeit the right to claim ITC on that same tax amount. To maximize your benefits, it is generally advised to claim the ITC upfront (if you have sufficient output tax liability) and depreciate only the net (pre-tax) cost of the asset.