No, that information will not automatically be updated in TurboTax. If you received a corrected 1099, you should delete the one that you have already imported, and re-import. Be sure you delete the old one first. Changes/corrections to investment reporting packages are very common due to the deadline and rush the brokers and those that provide them with information (e.g. mutual fund companies) are under to get the reports sent to taxpayers by the deadlines.
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