Thanks for the info! I have more questions on this, so thanks again in advance:
My conversion was done in the late 1990's. I moved several times in that period, so I no longer seem to have the paper record from Fidelity of the exact amount I converted, and Fidelity doesn't keep that information longer than 10 years (something I wasn't aware of until now). I have my tax returns from 2000 and 2001, showing the conversion amount I paid taxes on those years under "Taxable IRA Distributions".
So:
1.) If I can't locate my 1998 and 1999 tax returns, how can I find the exact amount I converted?
2.) Do I need to "prove" the original conversion amount to the IRS, and if so, how? The IRS web site seems to indicate they only supply copies of past year returns up to 7 years prior. Fidelity sent the IRS the original conversion information in the 90s.
Is a call to the IRS in order?