This is a really stupid one, but I can't seem to work out where to find invoices in the new version of the admin portal. The instructions that I received via e-mail and also those present in the Support section seem to be correct for the old portal.
Are you able to log in to the Admin Console at https://lastpass.com/company/#!/dashboard then click the 3 dots icon in the upper-right navigation, then click Show recent receipts?
Unfortunately not. I can log into the admin dashboard but I don't have a 3 dot icon in the upper right navigation. I believe because I'm on Lastpasses redesigned admin console. This is precisely my problem, Lastpasses help pages and also the e-mail they sent through with the invoice both have instructions that refer to this, but it doesn't exist on the screens I can access.
Thanks for giving that a try. So that we can resolve this issue as soon as possible or manually send those invoice(s) to you, could you reach out to the Business Support team to investigate and fix this for you? You can access the support number through your LastPass Admin Console > Support or request a callback by scrolling down and clicking "Contact Support" on this page and entering your Enterprise account info and you should then be given the option to receive a callback usually within less than 5 minutes: https://support.logmeininc.com/lastpass/help/how-do-i-contact-customer-support-for-lastpass-lp010121