Get your taxes done using TurboTax

Are you sure the retirement is being put on the K-1 form at all ?   That is not usual.  An IRA that is inherited is distributed outside of the estate so it should NOT be passed thru on the K-1 form. So talk to the estate administrator to find out what is actually  being passed thru to you ... did the estate sell off any properties, stock, income earned on bank accounts or something else?