In Feb of 1998 I converted a traditional nondeductable IRA valued at $7470 to a Roth thinking that's all that would be affected. I also had other IRAs (per-tax rollovers worth about $49,900) which apparently must be included in the 8606 calculations. This would result in a much larger tax hit than I expected. I filed a 4868 extension and must finalize (recharacterize the conversion ?) Any suggestions?

Forgot (no room) to include in the original question that the IRA basis (my after tax contribution to the converted IRA) was $6000. 1998 year end value was $9235 (from form 5498) and its current valuse is about $9880