Taxation Ruling IT 2488W - Notice of Withdrawal Income tax : variation of tax instalment deductions allowances paid under industrial instruments may be released NOTICE OF WITHDRAWAL Taxation Ruling IT 2488 has been withdrawn. It was replaced by Taxation Ruling IT 2583 which was issued on 10 May 1990. Commissioner of Taxation 19/01/95 NAT J237/18/7 P3; 87/3941-2 ISSN 0813 - 3662 IT 2583 IT 2488