|   | | and records and would be eligible for a bad debt deduction for  |  | federal income tax purposes if the claimant were required to file  |  | a federal income tax return. |  
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 |   |  | 3. Subsequent collection.__If a deduction is taken for a bad  |  | debt under subsection 2 and the debt is subsequently collected in  |  | whole or in part, the tax on the amount so collected must be paid  |  | and reported on the return filed for the period in which the  |  | collection is made. |  
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 |   |  | 4. Refund authorized.__When the amount of the allowable credit  |  | exceeds the amount of taxable sales for the period during which  |  | the worthless account is written off, a refund claim may be filed  |  | as provided in section 2011. For purposes of this subsection, the  |  | date of overpayment is the due date of the return on which the  |  | credit could first be claimed. |  
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 |   |  | 5.__Claim by service provider.__If the seller has selected a  |  | certified service provider as an agent to perform all the  |  | seller's sales or use tax functions, the certified service  |  | provider may claim the credit provided by this section on behalf  |  | of the seller. The certified service provider must credit or  |  | refund the full amount of any refund or credit received to the  |  | seller. |  
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 |   |  | 6.__Application of payments.__For the purpose of reporting a  |  | payment received on a previously claimed worthless account, any  |  | payments made on a debt or account are applied first  |  | proportionally to the taxable price of the property or service  |  | and the sales tax thereon and secondly to interest, service  |  | charges and any other charges. |  
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 |   |  | 7. Allocation.__The bad debts under subsection 2 may be  |  | allocated among the member states if the books and records of the  |  | person claiming the bad debt allowance support such an  |  | allocation. |  
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 |   |  | Sec. 38.  36 MRSA §1812, sub-§1, as reallocated by PL 1999, c. 790, Pt.  |  | A, §48, is repealed and the following enacted in its place: |  
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 |   |  | 1.__Computation.__Every retailer shall add the sales tax  |  | imposed by section 1811 to the sale price on all sales of  |  | tangible personal property and taxable services that are subject  |  | to tax under this Part. The tax when so added is a debt of the  |  | purchaser to the retailer until it is paid, and is recoverable at  |  | law by the retailer from the purchaser in the same manner as the  |  | sale price.__When the sale price involves a fraction of a dollar,  |  | the tax computation must be carried to the 3rd decimal place,  |  | then rounded down to the next whole cent whenever the 3rd decimal  |  
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