Login and invoice

Need to start today. Step 1. Member sign up, it is sent via email encrypted as has social security number. Info is saved to table and sent to Email Step 2. Member login page Use info from member sign up table Step 3. Member Inputs invoice. If they want to input more they can click add another and the info and invoice number stay the same but the product info is blank so they can add another product. Not tricky stuff just I don’t have time