Deposit with the department.

At any time while the petition is pending before the tax appeals commission or an appeal in regard to that petition is pending in a court, the taxpayer may offer to deposit the entire amount of the additional taxes, penalties, and fines, together with interest, with the department. The department shall, upon final determination of the appeal, refund to the appellant any portion of such payment which has been found to have been improperly assessed, including interest.