Click "Fill in Online" and a pop-up window will appear. Click OK, or click Login at the top right to enter the user registration interface, and click Register Now. Fill in the real information, mobile phone number and carry out identity authentication in turn. After the user name registration is completed, log in to the system again and click "Fill in Online" to officially start the enterprise "one window" declaration system. Before starting, the filling instructions will pop up. After the enterprise applicant has carefully read the contents, click "I have carefully read and agreed to the above contents" to enter the next step. After the signer logs into its "one-window" system, click "Electronic Signature" to find the enterprise to be signed, and click "Signature" corresponding to the enterprise to enter the basic information interface of the enterprise to be signed, and preview each submitted material. If it is correct, click Next to enter the interface of documents to be signed, and click Sign and OK. Login to sign the application, scan the QR code that appears and sign it electronically. After all relevant personnel of the enterprise complete the electronic signature, the customer logs into his account, clicks "Process Tracking", opens the interface, finds the applicant company, clicks "Submit", browses the information again, and finally submits.