Wait a second ... there are no limitations on how much you can CONVERT from a traditional to a ROTH IRA. The Limitations are on the CONTRIBUTIONS to the IRA and CONVERSIONS should never be listed as CONTRIBUTIONS. The form 8606 is ONLY used if you had non deductible contributions in the traditional IRA from prior year contributions. It works to make sure you don't have to pay taxes twice when making distributions or conversions. SO ... what did you do ?
