your basis, line 2, is the amount of non-deductible contributions made to your IRAs. I would think IRA custodians would have no way of knowing whether your contributions were deducted or not. so I don't see how the bank can properly report your tax basis in its statements. it may be showing the total of contributions made. There is no requirement to put noon-deductible contributions in one a/c and deductible in another.
if you've been using Turbotax since you started making IRA contributions line 2 is most likely correct.
you need to clarify the following since these are inconsistent'
the basis for everything is about 2 years old.
dragging from year to the next since at least 2006
the 8606 is only required in years you made non-deductible contributions which would show up on line 1 or take duistributions when you have a tax basis. Prior years non-deductible amounts should be on line 2, with the total on line 3 which should show up on line 2 in the next year's form until the year you start taking distribution then the carryforward amount would be from line 14.
