S. 90 : Double taxation relief-Foreign tax credit-Filing of Form 67 with certificates and statements is mandatory-Directory with respective to time-limit-DTAA does not prescribe filing requirement for foreign tax credit it will prevail over provisions of domestic law-Form, certificate and statements filed with return belatedly but before actually processing or before final assessment made is sufficient compliance-Entitled to credit-DTAA-India-USA.[S.6,90A, 91, 139(1) 139(4), R.128(9), Form No 67, Art. 25, 26]