"Ta ta" is an informal term used to say goodbye or farewell. There are many synonyms that can be used interchangeably with "ta ta." Some of them include "cheerio," "adios," "au revoir," "later," "bye-bye," "so long," "till we meet again," "farewell," "goodbye," "peace out," "see you later," "take care," "hasta la vista," "tata," and "toodles." Each of these synonyms carries its own unique tone, level of formality, and context. Whether you choose to use "ta ta" or one of its many synonyms, saying goodbye with grace and sincerity is always appreciated.