Notice code 550

Notice code 550 (Default) — We didn’t allow the amount of loss you claimed on one or more of the following schedules because For…

We didn’t allow the amount of loss you claimed on one or more of the following schedules because Form 6198, was incomplete or not attached to your tax return. - Schedule C, Profit or Loss From Business - Schedule E, Supplemental Income and Loss - Schedule F, Profit or Loss From Farming Form 6198 is required when you indicate on Schedule C, E, or F that some investment is not at risk.

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550

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What the IRS language says

We didn’t allow the amount of loss you claimed on one or more of the following schedules because Form 6198, was incomplete or not attached to your tax return. - Schedule C, Profit or Loss From Business - Schedule E, Supplemental Income and Loss - Schedule F, Profit or Loss From Farming Form 6198 is required when you indicate on Schedule C, E, or F that some investment is not at risk.