The letter of 1 John begins in verse 1:
That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked at and our hands have touched—this we proclaim concerning the Word of life.
The testimonies are all given in the first person plural—"we have heard", "we have seen", "we have looked", "our hands have touched", "we proclaim."
Yet, the second chapter begins with the first person singular:
My dear children, I write this to you so that you will not sin.
Do the opening statements indicate that multiple people are writing this letter? Or does the first person singular in 2:1 suggest a single hand? If so, why is 1:1 in the first person plural? Who is the "we" in 1 John 1:1?