After changing the legal person, tax changes cannot be made online, only offline. Where the contents of a taxpayer's tax registration change, it shall report to the original tax registration authority with relevant documents within 30 days from the date when the administrative department for industry and commerce or other organs handle the change registration.

Legal objectivity:

"Detailed Rules for the Implementation of People's Republic of China (PRC) Tax Collection and Management Law" Article 14.

Where the contents of a taxpayer's tax registration change, it shall report to the original tax registration authority with relevant documents within 30 days from the date when the administrative department for industry and commerce or other organs handle the change registration.

If the contents of the taxpayer's tax registration change and it is not necessary to go to the administrative department for industry and commerce or other organs for registration of change, it shall, within 30 days from the date of change, report to the original tax registration authority with relevant documents.