Why enter lump sum ssa from 2007 on 2017 1040. I reported and paid the taxes for ssa lump sum 2007 on 2007 tax form

You ask for a passed (2007) ssa disability payment.  When I recieved the lumps sum I reported it on my 2007 1040 and paid any fed tax due.  I am not sure I still have the 10 year old tax form. Can I just say I did not receive one and move on or what.