Nonqualified deferred compensation

I receive deferred compensation from my former employer.  It is reported via a W-2.  Box 11 (nonqualified plans) is populated with the same amount as Box 1.  In past years, Turbo Tax has treated that as ordinary income, and listed it in the income section of the 1040.  But this year, this income appears on Schedule 1, line t.  Why the difference?