If you start up a company while you have a salaried position complete with a 401k plan, you can still set up a SEP-IRA for your business and take the deduction.

如果你成立了一个公司同时有一个发薪水而且买401 K计划的职位，你仍然可以用你的商业建立一个SEP - IRA，然后作为费用抵减。

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If you want to save more or can't use a Simple, consider a SEP-IRA or a profit-sharing plan.

FORBES: Self-Employment

The solo 401(k) has some key advantages over a SEP-IRA. You can shelter more at lower earnings levels.

FORBES: How Entrepreneurs Can Get Big Tax Breaks For Retirement Savings

Here goes: deductible IRA, nondeductible IRA, spousal IRA, inherited IRA, Sep-IRA, Roth IRA, 401(k), aftertax 401(k), Roth 401(k), Simple IRA and Simple 401(k).

FORBES: Roll Over and Die Laughing