It’s normal for closed accounts to be on your credit report. See “Why Are Loans I Paid Off Still on My Credit Report?” for an explanation.
So, unless there’s a mistake in the reported closure (say, the report says the closing was done by a credit card issuer when it was really you who initiated it), you don’t need to do anything. If there is something wrong with the information, you would dispute it as you would any other credit report error.
Does that help? Let us know if you have further questions.