At this time there is no direct export from QuickBooks Online to TurboTax. You would need to run a Profit and Loss report to see the breakdown of various expenses and such that you would enter when doing your taxes with TurboTax.
In addition to what MJA66-87 mentioned, you can convert your QuickBooks Online data to QuickBooks Desktop through a trial subscription. Then, import it to Turbo Tax.
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