Double check that the transaction limits have not been meet. TurboTax Desktop has a limit of 10,000 of any combination of transactions and imports. The import file size also is limited to 4MB. If your file size or transaction numbers approaches these limits it is causing the system to time out and give the error. If your transactions are close to this number enter the sales totals instead of individual sales. If this does not correct your issue, try the troubleshooting in the link listed below:
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