/ Thesaurus / D Synonyms of declaration of estimated tax Find synonyms for: Noun1. declaration of estimated tax, estimated tax return, tax return, income tax return, returnusage: return required of a taxpayer whose tax withheld from income does not meet the tax liability for the yearWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language