which one is correct?
1- to perform the prescription naturally removes tartar.
2- to perform the prescription naturally remove tartar.
which one is correct?
1- to perform the prescription naturally removes tartar.
2- to perform the prescription naturally remove tartar.
In a comment to the question, you indicated that your sentences could be rephrased to make them understandable. Doing so, there are two versions of the sentence that would be fine:
1) Following the prescription naturally removes tartar.
2) Following the prescription will naturally remove tartar.
Notice how the different constructions determine if it's removes or remove.
I can't be more precise as to which you want to use, because the exact meaning of what you're trying to convey isn't clear from your sentences.
It's irrelevant whether it's an infinitive. If I understand correctly what you mean, "to perform the prescription" is a (singular) noun phrase playing the role of the subject of the verb "removes".
As Fumblefingers says, it is not clear what you mean by it, as the words you've chosen don't really go together.
The first example explains what performing the prescription does, possibly as a side effect. In this example, the verb takes the third-person singular conjugation (with the "s").
The second example is an imperative, which explains how to perform the prescription. In this interpretation, the second example needs a comma after "prescription". Because the example is in the imperative, it uses the second-person conjugation of the verb (without the "s").