It needs to be determined according to different situations. If the tax agreement signed by the employer is marked as "All Deduction", there is no need to re-sign the tax agreement; If the sign of the tax agreement signed by the employer is not "all deduction", you can choose to change the sign of the tax agreement to "all deduction" at any tax hall in the city (except the second tax branch) or sign a new payment agreement through the channels of Shenzhen Electronic Taxation Bureau (enterprise login), Shenzhen WeChat Taxation Bureau, @ Shenshui, and any tax hall in the city (except the second tax branch).