31 March Deficiency-Meaning,Examples,Deficiency Due to Fraud or Identity Theft (Commerce Achiever) Posted by commerce achiever1 Categories Accounts, Blogs, Learn - Free A deficiency is the numerical difference between the amount of tax that a taxpayer, or taxpaying entity, reports on a tax return and the amount that the Internal Revenue Service (IRS) determines is actually owed. The term only applies to … Read More