Miss. Code Ann. § 27-3-63

When, in the judgment of the Department of Revenue, an audit, examination or inspection of the books, records, invoices, papers, memoranda or other data appears to be required or necessary to determine the assessment of a tax, or to establish a tax liability, or to verify a payment of a tax, under the income, any privilege, sales, and excise tax laws of any kind of this state, of a taxpayer doing business both within and without the state and maintaining his principal place of business outside the state; such audit, or examination, or inspection may be made at the principal place of business outside the state to the same extent and same effect as audits, examinations, or inspections are made of books, records, invoices, papers, memoranda or other data located in this state.

The Department of Revenue, when directly charged with the duty of assessing and collecting any tax under any law which requires a taxpayer to keep adequate books, records, papers, invoices, memoranda or other data, at a place in this state, reflecting his liability for any tax due the state, and which taxpayer conducts his business both within and without Mississippi, and maintains his principal place of business outside this state at which his books, records, etc., are located, may elect to audit, examine or inspect all books, records, papers, invoices, memoranda or other data reflecting upon the Mississippi tax assessment and tax liability at the principal place of business of the taxpayer, rather than require the taxpayer to transport all of his books, records, papers, invoices, memoranda and other data to some place in this state.