(3)For the purposes of this section "specified person" means a person who has not 93[furnished the return of income for the assessment year relevant to the previous year immediately preceding the financial year in which tax is required to be collected, for which the time limit for furnishing the return of income under sub-section (1) of section 139 has expired and the aggregate of tax deducted at source and tax collected at source in his case is rupees fifty thousand or more in the said previous year]:Provided that the specified person shall not include a non-resident who does not have a permanent establishment in India.Explanation.—For the purposes of this sub-section, the expression "permanent establishment" includes a fixed place of business through which the business of the enterprise is wholly or partly carried on.]