No one will be able to help you except the developers. After some searching, I've seen that this is a governmental application used in Finances department. Luckily, they have a contact email that can be used. They are the only ones who can provide status information related to your documents.
If you didn't receive anything, then use the following contact email and get in touch with them: email@example.com
You can visit the website as well: http://www.bir.gov.ph/index.php/contact-us.html