Is assesses the plural of assess?

Answer 1

No.

"Assess" is a verb, so "assesses" is the third person singular form: "Bill assesses property," "She assesses property." The first and second person singular form, and the plural form, is "assess": "I assess property," "You assess property," "We assess property," "Don and Sheila assess property."

Answer 2

Assess is a verb, the corresponding noun is assessment, the plural form of which is assessments.

Answer 3

Assessments.