There are alot of factors to this question but I would say protein should compose 30-40% of your diet (with fat being 30% and carbs the otehr 30-40%). So for 2000 calories per day, that is 150 - 200 grams per day.
Are you looking to lose weight or gain muscle because 2000 honestly sounds low if you are trying to gain muscle and are training fairly hard.
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