The period prior to January 1st, 2022, form of PIT declaration shall be applied according to Circular No. 92/2015/TT-BTC
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Accordingly, in case a company is responsible to pay all salaries to a foreign worker who is seconded to work at the company by the parent company outside Vietnam (including the salary the parent company pays on behalf of the company), it has to withhold PIT on the whole income, including the income paid on the company’s behalf and use the form No. 05/KK-TNCN promulgated at Circular No. 92/2015/TT-BTC
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From January 1st, 2022, the PIT return shall be applied according to the new form promulgated at Circular No. 80/2021/TT-BTC .