Official Letter No. 2121/CT-CS dated July 30, 2025 of the Tax Department regarding registration of dependents when changing workplace
The taxpayer is only required to register and submit proof documents for each dependent once during the entire period they are eligible for family circumstance-based deductions. However, when changing workplace, since income-paying organizations do not have an information-sharing connection, the new employer will have no basis to apply the dependent deduction for the taxpayer. Therefore, the taxpayer must re-register their dependents to be eligible for the deduction immediately in the tax declaration period within the year at the new workplace.








