| If the State Tax Assessor determines, upon written application  | 
| by a taxpayer or during the course of an audit, that any tax  | 
| under this Part has been paid more than once or has been  | 
erroneously or illegally collected or computed, he the assessor  | 
shall certify to the State Controller the amount collected paid  | 
in excess of that legally due, from whom it was collected or by  | 
whom paid, and that.__That amount shall must be credited by the  | 
State Tax Assessor assessor on any taxes then due from the  | 
taxpayer and the balance refunded to the taxpayer or his the  | 
taxpayer's successor, administrators, executors or assigns in  | 
| interest, but no such credit or refund may be allowed unless  | 
| within 3 years from the date of overpayment either a written  | 
petition therefor, stating the grounds upon which the refund or  | 
credit is claimed, is filed with the State Tax Assessor assessor  | 
or the overpayment is discovered on audit within 3 years of the  | 
date of overpayment.  Interest, at the rate determined pursuant  | 
to section 186, shall must be paid on any balance refunded  | 
| pursuant to this chapter from the date the return listing the  | 
overpayment was filed, or the date the payment was made,  | 
whichever is later, on any balance refunded pursuant to this  | 
chapter, except that no interest may be paid with respect to the  | 
| refunds provided by section 2013 and, in cases of excessive or  | 
erroneous collections specified in section 1814, interest shall  | 
| must be paid in accordance with section 1814, subsection 3.  At  | 
the election of the State Tax Assessor assessor, unless the  | 
| taxpayer specifically requests a cash refund, the refund may be  | 
| credited to the taxpayer's sales and use tax account, but, in the  | 
case of a credit, no further interest may accrue from the date of  |