Questions & Answers about Ben araba kiralama ofisine gidiyorum.
In Turkish you form a definite noun phrase that you then mark for case by first adding the 3rd-person possessive suffix -i (“the …”) and only then the case ending. The template is:
root + (Plural) + Possessive + Case
Here: ofis + -i (“the office”) + -e (dative “to”) → ofisine = “to the office.”
If you wanted to say “to a car rental office” (indefinite), you’d drop -i and add bir:
Bir araba kiralama ofise gidiyorum.