I was consulted by a member of an LLC that is taxed as a partnership. Form
2022 they mistakenly filed Form 1120-S rather than Form 1065. They now want to fix it.
Do they file a 1065-X? Or do they file a 1065 with a letter explaining their mistake? It's not really an amended 1065, but it is supposed to replace the 1120-S.
Thanks for any thoughts.