Multiple rentals for a single rental 1031 exchange can't be done with the online version of TurboTax. You would need to use the desktop version of the program so you can go into forms mode and manually enter data. I would forwarn you to be very, very careful though. While you can do this is forms mode, if you force any "overrides", then you will not be able to e-file. You'll have to print, sign and mail the return.
