I need to modify my 2017 because I did not realize I could write off my house fire. It says I am due a refund now. Do I have to roll this over into a NOL for 2018?

[Anonymous]

you'll need to complete schedule A of form 1045 to see if you have an NOL. line 6 on the form would include most itemized deductions except those business related and casualty and theft losses resulting from a federally declared disaster

also if line 1 is positive it is most unlikely you have an NOL.    line 1 will be positive when adjusted gross income exceeds itemized deductions