The plural of yes can be either yeses or yesses. Yeses is the most common plural for yes in modern English.
If you add up all your yeses, they become a yes!
Yeses is the most common plural of yes and follows the regular word of adding an es to a word that ends in s to make it plural.
For every no, we are getting a hundred yeses.
Yesses is also a possible spelling for the plural of yes. It is an older spelling and is not as common in modern English.
For every no, we are getting a hundred yesses.
Yes’s is incorrect in formal English but you may see it online. Some people argue that you use the apostrophe in place of the “e”.