Hello there, nr23.
I'm here to help resolve your concern about inviting employees to Workforce.
Let's ensure that the entered email addresses are correct. If they use QuickBooks Online, let them enter a different email address other than the one they use to log into their Workforce account.
If the details above are correct, yet, the same issue persists, I'd suggest reaching out to our Workforce team. We're available from Monday through Friday from 6:00 AM to 6:00 PM PST. To contact them, scroll down to the Get Help with Workforce section and then click Chat with us on this page: Contact Workforce.
Here are a few articles that will help you in inviting your employees for them to view their paychecks and W-2s:
Keep me posted if you have other concerns about managing employees.