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carryback

[kar-ee-bak]
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noun
  1. (in U.S. income-tax law) a special provision allowing part of a net loss or of an unused credit in a given year to be apportioned over one or two preceding years, chiefly in order to ease the tax burden.Compare carry·forward(def 2).

Origin of carryback

First recorded in 1940–45; noun use of verb phrase carry back
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018