Hello,

We are looking to initiate our TIRA to ROTH conversions within the next few days. Husband will roll-in the pre-tax amount in his TIRA to a 401K, and convert the balance to ROTH. I will convert the entire amount in my TIRA to ROTH.

We are doing this largely to stop the pro-rata bookkeeping nightmare and are willing to pay the upfront tax to do so.  However, if we roll-in/convert ALL of our existing TIRA funds, will that zero out Line 14 on our Form 8606? Our brokerage house has advised us that taxes would not be due on this basis amount. But if this process zeroes out the basis, how will the IRS know what it was was so we aren’t paying taxes on the entire ROTH conversion?

Thank you.