To ensure you secure your entry, you will need to purchase your award entries before you can submit. (Invoices do not need to have been paid by deadline but must be paid within 30 days of purchase and by shortlist announcement).
Once purchased, you will receive the link to enter - this will be on the checkout confirmation page, the invoice/confirmation email and under My account > my award entries > award entry form.
You can start each entry and save it as a draft to submit at a later time (but by the appropriate deadline) - all drafts appear under My account > my award entries.