when you import you should check the info against what's on the 1099's. i did an import from the broker and what didn't get imported was royalty income (taxable income would have been understated) and purchased interest on bonds ( taxable income would have been overstated) don't rely on imports being 100% correct. they may be. but would you like to get a notice from the IRS saying you owe additional taxes? I don't know if TT accuracy guarantee applies when you import.
