Honorific Speech and Speech Levels in Korean is also called Hapsyoche(합쇼체). It is usually used by TV broadcasters, or in a business situation talking to customers. It is also used between strangers, but Informal Polite Form of Korean Verbs and Adjectives is now more commonly used.
When you look up a verb or adjective in a dictionary, it is always written with a 다 ending. In order to Essential Concepts and Terms for Grammar Study a Korean verb or adjective to formal polite form, Word Stems of Korean Verbs and Adjectives and do a Korean Verb and Adjective Conjugation.
When the stem ends with a consonant (C), attach 습니다 to it.
When the stem ends with a vowel (V), attach ㅂ니다 to it.