My postal address remains the same.

我的邮寄地址照旧。

Do you have my postal address?

你有我的邮寄地址吗？

Include your full postal address.

写上完整的邮政地址。

Please write your postal address here.

通信地址，需要写详细点。

You cannot use your country as your postal address.

你不能用你的国家名作为邮政地址。