A deferred compensation agreement is an agreement between a company and an employee that withholds paying some of the employee's salary. Enrolling in the Plan is easy. 1.A deferred compensation plan is any plan that withholds a portion of an employee's pay until the end of the deferral period. A trust is established as part of the deferred compensation plan for the benefit of participants in the plan. (b). The Maryland Small Business Retirement Savings Program, a.k.a. On his or her Salary Reduction Agreement pursuant to Section 4.01. Fiduciary taxpayers must file an income tax return on Form. 504. Fiduciaries who are an Electing Small Business Trust.