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. 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. File Form 5500 to report information on the qualification of the plan, its financial condition, investments and the operations of the plan. This schedule is required to be filed under section 104 of the Employee. Form 5500 is filed with the DOL and contains information about a 401(k) plan's financial condition, plan qualifications, and operation. Most retirement plans are required to submit Form 5500 at the end of July. Changes effective this year are significant.