Form 4684 for 2016 Amended

[southern tax lady]

My client is in one of specific disaster loss areas for 2016 more specifically, the flooding in Louisiana.  I want to amend his 2016 return to provide him with an additional refund.  Per the IRS instructions for amending the 2016 return I must take the $500 deductible and its not subject to the 10% reduction due to income level.  I have looked at the 2017 Form 4684 and it is working as the instructions say to do it.  What am I'm doing wrong as that functionality is not there for amending 2016.