In '98 my wife & I rolled over our regular IRAs into a Roth. Line 15b will be approximately $ 30k for four years. We now learn our '98 AGI is $ 102K. In '98 we made a $ 2000 (each of us) Roth contribution. Does the $ 100K maximum for a Roth exclude or include our Roth Conversion income of $ 30K ? If I need to undo this, please advise what is needed. THANKS.

The amounts which are includible in your taxable income because they were properly converted from a traditional IRA to a Roth don't increase your MAGI for the purposes of determining your eligibility for the Roth.

The 2000 roth contribution is not subtracted from your AGI. However, the Roth conversion is not included in you AGI either the full amount or the 1/4 option. If you must recharacterize because you expect to be over 100K, then do not file your tax return until you see your IRA custodian. If you have any doubts about your qualifications or the math, see an accountant. You probably should file an official request for an extension with the IRS given the few days left to April 15.