There are many reasons that could result in such a situation; and since
this is a public forum you do not want to post your personal
information. The primary reason is very simply that you likely HAVE NOT
completed entering ALL of your information --the guesstimate is only as
good as the information you enter accurately and correctly.
The only way to determine what is happening is to compare your 2015 and 2016 returns line by line and see where the differences are.
