TurboTax will round it down to $0.00 (the IRS encourages rounding to nearest whole dollar so TurboTax does that). I have no idea what that would do when it comes to a conversion. It would work on the tax form due to rounding, but I don’t know what would happen when the IRS tries to reconcile the form 5498s.
The whole scheme seems needlessly complicated. If you don’t need 4 IRA accounts, close two, or do 4 back door IRAs at $1750 each.
