If QB users forget sign-in information while qb online login then there are a few ways to sign in with information, such as their email, phone number, or user ID. QB user ID is basically an email address. If they enter the email address associated with their QuickBooks account, Intuit will be sending a one-time code to that email to access their account. If they fail to remember which email, they used, then they should try entering their phone number. Intuit will text them a one-time code to access their account.
https://qbooklogin.com/