This paper shows the work to create instruments for linguistic annotation of grammatical categories of Sakha language (Sakha language and Yakut language are full synonyms). It describes the basic inflectional characteristics of Nouns of Sakha language (numbers, personal endings, possessive endings, cases), which are based on Leipzig Glossing Rules. As a result of scientific research (2014-2018) the system of tags was developed, which reflects all word forming potential of the Nouns in the Sakha language, including 247 morphological indicators in its arsenal. It should be noted that the standardized system of morphological tagging of Turkic languages, developed by the Turkologists, is far from perfect, there are various treatments concerning reflection and interpretation of grammatical categories in different Turkic languages. Despite this, the article summarizes constructive and progressive ideas of our colleagues on this matter.