Hello @tnt92fox
Welcome to the LastPass Community. You will have to open the vault, hover your mouse over the site, click on the wrench button, there you will be able to see what passwords you are using for each site. You could also export your vault data, open vault, advanced options, export, a CSV file will download onto your computer and it will have all of your vault data.
Please let us know if there is something else we can do for you.
Greetings!
Heyner | Customer Care