a single-member LLC is disregarded for income tax purposes.
you would report your rental properties the same way you did before the LLC was created. The management fees and related expenses would go on schedule C (you do not report the operations of the other properties). Since it seems you do not have an ownership interest in these other properties you would need to supply their owners with a cash flow statement so they could prepare their income taxes. There are no partnerships so no 1065s would be filed.
cash flow statement - an example of what it might contain:
cash beginning of the year
rent received
other cash received - describe
expenses by category
capital expenditures
distributions to owners
cash end of year.
one would be needed for each property.
you also need to file 1099-MISC to report the rents collected for others to the IRS
