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@MarinaEA wrote:

So I would enter a 10k loss on the K-1 1040 line 1

where would I enter the carryover 70k loss next year if the basis allows?

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Yes.

I don't think ProSeries even has an input for it.  So a work-around would be to add a second K-1 next year, using the same EIN but name it "PYA", and enter the usable amount that was carried forward.