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@RATTnroll wrote:

Since the software will import 1099's and W2's,

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It can import 1099s and W-2 because employer's payroll companies, brokerages, etc. upload them to a central database where they can be downloaded to your computer.

In order to import K-1s, there would need to be a setup for many Partnerships and S-corporations to be upload their private information to a central database.  No such thing exists (and even if it did, I'm not sure if I would want to be uploading my client's information to a third-party database).