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account. Petitioner failed to report over 90% of her total taxable income for each of the years at issue.
We find that petitioner substantially underreported her income for 1998-99 and 2000-06. Given the amount of her underreporting, her pattern of underreporting income, and her lack of any satisfactory explanation for underreporting, petitioner's understatements are persuasive evidence of fraudulent intent.
b. Failing To Maintain Adequate Records
The failure to maintain adequate records supports a finding of fraud. See Truesdell v. Commissioner, 89 T.C. 1280, 1302-1303 (1987); see also Grosshandler v. Commissioner, 75 T.C. 1, 20 (1980). Although we consider the taxpayer's level of expertise, a taxpayer is not excused from keeping accurate records when the taxpayer has experience operating his or her own business. Korecky v. Commissioner, 781 F.2d 1566, 1569 (11th Cir. 1986), aff'g T.C. Memo. 1985-63.
In a letter attached to her untimely filed returns, petitioner wrote: "I have not kept financial records, as I did not know that I needed to do so." Petitioner introduced no records of her income and did not substantiate the amounts she claimed as income on her tax returns.
