Thank you very much for taking time to answer my question.

We don't have an employee and no pay checks involved here.  We have set up a company 401K a few years ago and have been putting money in.  I know we can make a contribution by April 2019 and deduct from 2018 tax return according to our CPA.  Just never did this in the past, so I'd like to know how to do it on Quickbooks.