Complete a new REV-419 every year or when your personal or financial situation changes. Photocopies of this form are acceptable.1.Log in to your online Defined Contribution Plan account. Documentation Required: Enclose Form W-2 and any other form indicating compensation received. Is deferred compensation (401(k), 457(b) plans) taxable? Why were my unreimbursed business expenses disallowed or reduced? Deferred compensation refers to money received in one year for work performed in a previous year often many years earlier.