Mississippi Code Title 27. Taxation and Finance § 27-3-81

The Department of Revenue may require, consistent with the cash management policies of the State Treasurer, that any person owing Twenty Thousand Dollars ($20,000.00) or more in connection with any return, report or other document to be filed with the Department of Revenue shall pay any such tax liability to the state no later than the date such payment is required by law to be made in funds which are immediately available to the state on the date of payment. Payment in immediately available funds may be made by wire transfers of funds through the Federal Reserve System or by any other means established by the Department of Revenue, with the approval of the State Treasurer, which ensures availability of such funds to the state on the date of payment. Evidence of such payment shall be furnished to the Department of Revenue on or before the due date of the tax as established by law. Failure to timely make such payment in immediately available funds or failure to provide such evidence of payment in a timely manner shall subject the taxpayer to penalty and interest as provided by law for delinquent or deficient tax payments. If payment is timely made in other than immediately available funds, penalty and interest shall be added to the amount of tax due from the due date of the tax payment to the date that the funds for the tax payment become available to the state.