You would begin to enter the exchange in the same manner as any other 1031 exchange in TurboTax, if that is indeed what you did (since you mentioned you "sold a rental property" - hopefully you did a proper exchange through a qualified intermediary).
In TurboTax, simply enter "like kind" in the search box, click "Jump to like kind", and then check the "Any additional like-kind exchanges (section 1031)" box.
Note that you can only defer gain when the value of the replacement property you acquire exceeds your basis in the property you relinquished.
