香港稅務(wù)局有權(quán)追加6年的稅款，如涉及漏逃稅，可追回10年的稅款。會計記錄及業(yè)務(wù)證明文件要保存7年的。

(1)Where it appears to an assessor that for any year of assessment any person chargeable with tax has not been assessed or has been assessed at less than the proper amount, the assessor may, within the year of assessment or within 6 years after the expiration thereof, assess such person at the amount or additional amount at which according to his judgment such person ought to have been assessed, and the provisions of this Ordinance as to notice of assessment, appeal and other proceedings shall apply to such assessment or additional assessment and to the tax charged thereunder: (Amended 16 of 1951 s. 10; 49 of 1956 s. 44)Provided that—
(a)(Repealed 2 of 1971 s. 39)
(b)where the non-assessment or under-assessment of any person for any year of assessment is due to fraud or wilful evasion, such assessment or additional assessment may be made at any time within 10 years after the expiration of that year of assessment. (Amended 49 of 1956 s. 44)
(2)Where it appears to an assessor that the whole or part of any tax repaid to a person (otherwise than in consequence of an assessment having been determined on objection or appeal) has been repaid by mistake, whether of fact or law, the assessor may, within the year of assessment to which the repayment relates or within 6 years after the expiration thereof, assess such person in the amount of tax so repaid by mistake, and the provisions of this Ordinance as to notice of assessment, objection, appeal and other proceedings shall apply to such assessment and to the tax charged thereunder. (Added 2 of 1971 s. 39)
(3)No assessment shall be made under subsection (2) if the repayment was in fact made on the basis of, or in accordance with, the practice generally prevailing at the time when the repayment was made. (Added 2 of 1971 s. 39)
(4)Section 27 of Schedule 17A (specified alternative bond scheme and its tax treatment) provides for modifications to this section.

參考@falin 之前的問答：香港《稅務(wù)條例》第 51C 條規(guī)定每名在香港經(jīng)營某行業(yè)、專業(yè)或業(yè)務(wù)的人士，須就其入息及開支以中文或英文備存足夠的記錄，以便其應(yīng)評稅利潤易于確定。根據(jù)《稅務(wù)條例》 的規(guī)定，在香港經(jīng)營業(yè)務(wù)的人士，應(yīng)保留相關(guān)記錄至少 7年。如果相關(guān)人士沒有合理辯解而沒有遵照稅法的規(guī)定保留業(yè)務(wù)記錄，可能會面臨被罰款高達港幣 10 萬元。http://www.lxbsy.com/question/63555

要保存七年

7年追溯期

6到10年，厲害了。

七年