One is to go directly to the tax bureau and the social security service center window and ask for an update of the mailing address.

One is to take out the previous letter, fill in the new address with the receipt of change of address, and send it back to the tax bureau and the social security center respectively.

One is to call the tax bureau and the social security service center to make changes. (But there is a certain difficulty, that is, how to confirm your identity, which is generally possible. The other party will ask you to report your ID number, original address, company and other information to check your identity. )