If your spouse was covered under a retirement plan at work, and your combined AGI exceeded $160k, you weren't elibible to make a deductible IRA contribution even though you weren't covered under a retirement plan that year.

If your AGI fell between $150k and $160k, you were eligible to deduct the prorata portion of your IRA contribution.

And any year that you make non-deductible IRA contributions, make sure to complete and attach a Form 8606 to your federal tax return. On that form, you keep track of your post-tax contributions to your IRA. Whenever you begin drawing money from your IRAs, you'll need to know your total non-deductible contributions over the years.

Finally, remember that you can only go back and amend returns from 2004, 2005 or 2006. Assuming you filed returns for the other years on a timely basis, those years are closed for you.

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