Yes, request for amendment has to be made online. All amendments in registration particulars, except some core fields, can be amended in the system without the intervention of any official by merely filing the details of the amendment. Also for some amendments, approval may be needed. Examples of fields which require approval are- legal name of business, address of the place of business and addition, deletion or retirement of partners or directors etc. responsible for day to day affairs of the business. Examples of fields which can be amended without any approval are- change of telephone number, email ID, bank account etc.
(FAQ 21: MSME)