To submit an account change request form, you should first obtain the form from your service provider or organization, either online or in person. Complete the form by providing the required information and any necessary documentation, ensuring that all details are accurate and up-to-date. Once completed, submit the form through the designated channel, which may be online, via email, or in person at a local branch or office. Be sure to follow any specific instructions provided by your service provider, as the submission process may vary.