It is acceptable to divide the rents among your three properties, as long as the total adds up to what is shown on the 1099-MISC you received.
TurboTax will want to assign the entire 1099-MISC to one property, so you will have to create multiple 1099-MISC to report the amount. For example, if you received a single 1099-MISC for $36,000 you could divide it into three 1099-MISC for $12,000 - or whatever the appropriate amount is.
The IRS is most interested that the income is fully reported.