When you have uploaded the Declaration of Conformity and confirmed the details, you will see what documents you're required to have.
After you have review that you have the documents, you enter the compliance contact details for the product and click "Send agreement".
You will then receive an email with the link to the agreement. Check your spam folder if you haven't received anything.
When you open the agreement, the digital signing will help you with what fields you need to fill out before signing.
Carefully review the document before signing, digital signatures are binding.