I think he said that he has received an offer but has not yet joined the organization. Am I right, Sai? If this is the case, please inform them about the inflated salary information you provided and apologize for that. Sometimes, they may consider it. Otherwise, there should not be any problem as they will not release an offer letter to you. So, you can continue in the same organization.
After joining the organization, if they find out about this, your job will be in jeopardy. Providing incorrect information to an employer will be taken seriously. This could affect your career in the long run, and you may not be able to recover from it. Act quickly and rectify the situation.
Regards,
V. Balaji