any qualifying child unless the taxpayer includes the name and taxpayer identification number of such qualifying child on the return of tax for the taxable year and such taxpayer identification number was issued on or before the due date for filing such return. (2) Taxpayer identification requirement No credit shall be allowed under this section if the identifying number of the taxpayer was issued after the due date for filing the return for the taxable year. (f) Taxable year must be full taxable year Except in the case of a taxable year closed by reason of the death of the taxpayer, no credit shall be allowable under this section in the case of a taxable year covering a period of less than 12 months. (g) Restrictions on taxpayers who improperly claimed credit in prior year (1) Taxpayers making prior fraudulent or reckless claims (A) In general No credit shall be allowed under this section for any taxable year in the disallowance period. (B) Disallowance period For purposes of subparagraph (A), the disallowance period is— (i) the period of 10 taxable years after the most recent taxable year for which there was a final determination that the taxpayer's claim of credit under this section was due to fraud, and (ii) the period of 2 taxable years after the most recent taxable year for which there was a final determination that the taxpayer's claim of credit under this section was due to reckless or intentional disregard of rules and regulations (but not due to fraud). (2) Taxpayers making improper prior claims In the case of a taxpayer who is denied credit under this section for any taxable year as a result of the deficiency procedures under subchapter B of chapter 63, no credit shall be allowed under this section for any subsequent taxable year unless the taxpayer provides such information as the Secretary may require to demonstrate eligibility for such credit. (h) Reconciliation of credit and advance credit (1) In general The amount of the credit allowed under this section for any taxable year shall be reduced (but