File your Form 5500 series with ease. Access resources and official guidance for plan reporting and compliance.File Form 5500 to report information on the qualification of the plan, its financial condition, investments and the operations of the plan. Pension Benefit Plan Filing. Requirements. Pension benefit plan filers must complete the Form 5500. This form is required to be filed under sections 104 and 4065 of the Employee. Form 5500-EZ generally is required for all one-participant plans, including plans with owners, business partners, and spouses. Form 5500 is filed with the DOL and contains information about a 401(k) plan's financial condition, plan qualifications, and operation. If you have a defined contribution, or defined benefit plan, this guide may help you file your form 5500-EZ or 5500-SF. To meet ERISA reporting requirements, most 401(k) plans must file a Form 5500 annually.