Contributions to a retirement plan can only be made from compensation, which, in the case of a selfemployed individual, is earned income. Solo 401(k) is a retirement saving and investment plan employers can offer that provides employees a tax deferral on money contributed.In this post, we identify the best 5 retirement plans for SCorporations. We will also show you why a SEP might not be the best plan. Retirement plan associated with past occupational activity. The Solo 401k is a fantastic Single Owner S Corp retirement plan option. Call the Texas Municipal Retirement System or TMRS at 1.800. 924.8677 to request your personalized retirement estimate. What is the fee to file an Assumed Business Name? A person may not receive an exemption under this section for more than one residence homestead in the same year.