You can create your Seamlss account with your Xero login instead of filling in the sign-up form.
In Seamlss: Sign up with Xero, at the bottom of the sign-up page.
Open the sign-up pageWe recommend the sign-up form. Signing up with Xero works, but it means extra work later to link your subscription and emails to your account. Fill in the sign-up form instead. See Register your firm. You can still use Sign in with Xero afterwards.
Joining a firm that already uses Seamlss? Don’t register. Registering creates a separate firm. Ask your firm’s admin to add you from Settings, Users, and you’ll get an invitation by email.
If you still want to use Xero #
Select Sign up with Xero
It’s under the Register button on the sign-up page.

Log in to Xero
Xero asks you to log in, then asks your permission to share your details with Seamlss.
Finish in Seamlss
Then work through the Setup page. See Start with the Setup page.
Logging in later? Use the same email for Xero and Seamlss. After this, you can log in with Sign in with Xero on the login page.
Something not working? #
I already have a Seamlss account
You don’t need to sign up again. Use Sign in with Xero on the login page instead.
I’d rather not use Xero
Fill in the sign-up form instead. See Register your firm.
Still stuck? Contact support and tell us what you see.