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Who is correct?"
There might have been some confusion in terms of the product involved. You will certainly note that TurboTax Business is awfully close to TurboTax Home & Business and it is only the latter that allows importing tax reporting statements, such as 1099s.
The screenshot below is from the partnership module (Form 1065) and note that next to "Import" in the dropdown only "QuickBooks" appears as an option (in the 1041 module "Import" does not appear at all).
