[ kar-ee-bak ]
/ ˈkær iˌbæk /
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(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).
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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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. 2022

How to use carryback in a sentence

British Dictionary definitions for carryback

carry back
/ tax accounting /

(tr, adverb) to apply (a legally permitted credit, esp an operating loss) to the taxable income of previous years in order to ease the overall tax burden
noun carry-back
an amount carried back
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012