Place of Birth, Post office, etc

https://preview.redd.it/iqq2a0zf1sfe1.png?width=2412&format=png&auto=webp&s=71ab6d951f89add76ce360f3639ce57e9159307f

It is sort of unclear to me what should put as post office after place of birth. Should i put post office of current address or the post office of place of birth as for me, they are different.
Wouldn't the Post office and city/town be the same?