Dear Ragib, you can login and then try uploading your images. The correction date is after the Basic Registration closes. And it is mandatory that you upload the images to complete the process of Basic Registration. Without uploading the pics, it will be incomplete registration and you cannot make any changes during the correction window for incomplete registrations. Please try logging in and uploading the images. If it doesn't happen, then please re-register with different credentials and then re-fill the form with all due steps.