A taxpayer who has not received a written notice of an audit or determination of tax liability may seek disclosure of tax liability by applying to the Tax Administrator in writing for voluntary disclosure of the taxpayer's liability pertaining to a particular tax and agreeing to pay, within ninety (90) days of the date of the application, the tax due plus 1% interest per month for all periods prior to filing the application, but not more than four (4) years prior thereto. The taxpayer shall be liable for any underpaid taxes and accrued interest during the four (4) year time period but, except for the taxes and interest due under this Section, the taxpayer shall not be liable for any taxes imposed prior to the date of the application for voluntary disclosure.