A real estate syndication or fund is taxed as a partnership. Each year it files a Form 1065, allocates income, loss, deduction, and credit to the partners according to the operating agreement, and issues a Schedule K-1 to every investor. That sounds mechanical. It is not.
The hard part is making the return reflect what the agreement actually says. Allocations have to follow the waterfall and the special allocation provisions, not a simple pro-rata split that ignores the preferred return or the promote. Capital accounts have to be carried forward correctly. When the return is built by someone who never read the operating agreement closely, the K-1s come out wrong in ways that no one notices until an investor or an auditor asks.