S-Corp owner / employee with new 401K, Made paycheck contribution only, no S-Corp participation. Where do I report the new 401K and contributions made?

I am an S-Corp owner and the only employee. In 2016 I opened a business 401K. I contributed to it from my paycheck/deduction, but the S-Corp did not contribute at all. My questions are:

(1) Where do I report the new 401K (business/personal taxes)?

(2) Where do I report my own (employee) contributions?

(3) Where will I report future S-Corp contributions?

Thank you.