Mucous is the adjectival form of the more familiar noun, mucus. In other words, mucous is actually the action or ability to make the yucky stuff we blow into tissue, which is mucus. There are mucous cells, mucous fluid, mucous membranes, and mucous glands. They are all different objects that can secrete mucus.
  Thus, if you have business income, you can contribute to your ROTH IRA if you are eligible and a SEP IRA. If your SEP IRA is likely to become substantial or you have funds in a 401(k) from a previous employer and you are an one person (or one person with a spouse) business, you should look into individual 401(k)s.
You can have both a 401(k) plan and a SEP-IRA if you have wages and self-employment income, but chances are those plans will have different administrators. When you participate in your employer's 401(k) plan, you have no choice about the administrator.ou must have self-employment income in order to qualify for a SEP-IRA. If you receive a 1099 from one or more clients, or if you self-report income from freelance or consulting work, you can shelter a portion of that income from current taxes by setting up a SEP-IRA.