A tagset is a list of part-of-speech tags (POS tags for short), i.e. labels used to indicate the part of speech and sometimes also other grammatical categories (case, tense etc.) of each token in a text corpus.
Amharic part-of-speech tagset is available in Amharic corpora annotated with the TreeTagger tool trained on manual annotation of Amharic 1065 news items containing 210,000 prosodic words. The manual annotation was developed by the Ethiopian Languages Research Center of Addis Ababa University