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Disputes regarding interest issues are not uncommon. Taxpayers frequently file refund claims for overpaid underpayment (deficiency) interest or requests for additional overpayment interest. Such a submission generally results from an analysis of the taxpayer's federal tax accounts and related IRS interest computations that a service provider specializing in interest and other IRS account-related issues performs. Issuance by the Service of a statutory notice of deficiency (90-day letter) to the taxpayer may affect the taxpayer's ability to file a later refund claim for overpaid interest for the same tax period.
