HI I contribute to my HSA I get a 1700.00 incentive for doing a risk assessmen. In the HSA portion of deductions it shows 3800.00 contribution by my employer not the 1700

I am showing no deduction for HSA how do I do that. I contribute 200.00 a month pre-tax to HSA
In order to reduce my taxable income can I contribute more to my HSA before April 18 2017 for 2016 tax?? to reduce my taxable income?