- 7 - period for filing a timely petition with respect to either of the notices of deficiency, it follows that we lack jurisdiction over the petition. Secs. 6213(a) and 7502; Rule 13(a), (c); see Normac, Inc. v. Commissioner, supra. The question presented is whether dismissal of this case should be premised on petitioner's failure to file a timely petition under section 6213(a) or on respondent's failure to issue valid notices of deficiency under section 6212. Petitioner contends that respondent failed to mail the notices of deficiency to his last known address. We disagree. Although the phrase "last known address" is not defined in the Internal Revenue Code or in the regulations, we have held that a taxpayer's last known address is the address shown on the taxpayer's most recently filed return, absent clear and concise notice of a change of address. Abeles v. Commissioner, 91 T.C. 1019, 1035 (1988); see King v. Commissioner, supra at 681. The burden of proving that a notice of deficiency was not sent to the taxpayer at his or her last known address is on the taxpayer. Yusko v. Commissioner, supra at 808. There does not appear to be any dispute that the notice of deficiency for 1990 was mailed to petitioner's correct address but for his separation from his wife at the time the notice was issued. In the absence of any evidence that petitioner notified respondent that he was living at an address other than the Fayetteville address at that time, we conclude that respondentPage: Previous 1 2 3 4 5 6 7 8 Next
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