Co-0p dividend
ProSerieshandling of Co-0p dividend
handling of Co-0p dividend
What kind of co-op? If it's a consumer purchasing organization such as a food market or REI, the dividend is simply a reduction of the cost of purchases and has not tax implication. If it's business-related, the dividend would reduce the deduction for whatever category of purchases the business made.

In several cases Co_op dividends are reported on Schedule F either under Copperative Distributions (ie 1099-PATR) or othyer Income on Schedule F not reported on Form 1099. You can also receive some of them on Form 1099-Misc which you can link to Schedule F