Per IRS' form 1065 instructions, if an LLC did not receive any income and did not incur any expenditures treated as deductions, there is no need to file form 1065. As far as I see this is what the IRS says in her instructions.
An LLC with two members was active a few years ago for about 11 months in one calendar year. That is, it was started and dissolved the same year. They absolutely had no income and no expenses deducted anywhere. Form 1065 income and deductions were to be all zero. However, they did not file any form 1065 for this LLC. The LLC is now completely dissolved. Members are trying to figure out whether they were expected to file a final form 1065 even though they had zero income and zero expenses and deductions in the lifetime of the LLC. If the answer is yes, are they facing any late filing penalty for filing a past year 1065 late? On the other hand, the LLC existed less than a year, they did not file an initial return either.