Each account has to have it's own User ID but you can use the same email for several accounts so this will not issue a warning ... this is handy for doing dependent's returns after the parent's returns so the same email can get all the TT messages instead of opening individual email accounts for all the minor children.
And having multiple accounts is not an issue for the IRS ... they don't care. It only becomes an issue for the user if they lose access to those email accounts ... which is another reason for not using the email for the UserID.
Now if you have filed a return and it was accepted for processing you can check up on the refund ...
For your tax refund - go here
For your stimulus payment - go here
