You do not have to file an income tax return for your multi-member LLC in Florida (unless one of the members is a corporation).
If you have neither income nor expenses, you do not have to file a Form 1065 with the IRS either.
See https://www.irs.gov/instructions/i1065#idm140672607577504
Obviously, if your LLC has expenses, you are required to file Form 1065.
