File your Form 5500 series with ease. Access resources and official guidance for plan reporting and compliance.Fill in the short plan year beginning and ending dates in the space provided and check the appropriate box in Part I, line B, of the Form 5500. File Form 5500 to report information on the qualification of the plan, its financial condition, investments and the operations of the plan. Who Must File Form 5500-EZ. You must file Form 5500-EZ for a retirement plan if the plan is a one-participant plan or a foreign plan that is required to file an. Form 5500 is filed with the DOL and contains information about a 401(k) plan's financial condition, plan qualifications, and operation. For information, contact the authors. This form is required to be filed under sections 104 and 4065 of the Employee. This schedule is required to be filed under section 104 of the.