If your LLC neither receives income nor incurs any expenditures treated as deductions or credits for federal income tax purposes you do not have to file a 1065 for a multi-member LLC.
Since you have a single-member LLC, your LLC is treated as a disregarded entity for federal income tax purposes and you would file a Schedule C, the same as a sole proprietor.
Since you have neither income nor expenses, there is no federal income tax form you need to file for your LLC, either way.
