K-1 die date if I need K-1 from another entity to file my 1065
I run a multi-member LLC which is treated as a partnership (P'ship A). A is a partner in another partnership (P'ship B) and needs the K-1 from B to complete its return. Are both K-1s due Mar 15? Which makes it impractical for A to file return and issue it's K-1s timely. If filing extension the only way to file correctly?
