Regarding the wrong information filled in attestation form

Hello, Dear Sir or ma'am, I'm selected as a clerk yet to receive my appointment letter. While fill-in my attestation form I filled some information incorrectly because I wasn't aware of that issue. There was a police case against me in 2013 which was filed by my neighbor for some conflicts, after 5-6 months the Issue was resolved and case was almost disposed(as my uncle said) but now I get to know that the whole process has been initiated again and I have to appear before the court this month. I talked to the person who filed case and convince him to dispose it off permanently he agreed do so. But the problem is, how can I correct my mistakes because it is a sheer folly to hide anything from the department where you are going to serve!! Please suggest the solution!!