That's okay that you have objected the thing in 2011 but my query is that they should have added it to your income there and then because they won't take so long to finalize an order so I need to know whether you have received any assessment order or not. Because if this is a fresh notice you have received in 2018 then it is time barred and we need to object that first we can't simply reply everything.
And if you want to reply this notice normally then just provide them the evidence of deduction claimed u/s Chapter VI A because form 16 is only considered as an evidence of the deductions which are incurred directly by company for eg: EPF, insurance etc and if you have claimed any other deduction then you need to give it's evidence and along with that provide them with a revised computation sheet which shows proper calculation of tax.
Because in case of deduction under chapter VI if you have forget to claim them in your return of income you can claim them even at the time of assessment, so he can't refuse to accept the evidence of deduction under chapter VI A.
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