See Line 216 & 217 in Form 11
216. Income from Irish employment not subjected to PAYE (include payments received on commencement/cessation of employment, restrictive covenants, etc.)
(a) Amount chargeable to tax
(b) Nature of Payment(s)
217. Amount of Top Slicing Relief (TSR) claimed in 2011
You enter the amount of ex-gratia redundancy received that is chargeable to tax into Box 216a and then you enter the amount of top-slicing relief claimed in Box 217
Box 414 is for Other Exempt Income (not already covered by the other sections in Section G of the form) so I suppose you could enter the Statutory redundancy and the non-taxable element of the ex-gratia redundancy in there if you want!