I log in for my clients to schedule their payroll tax deposits.  I used my ID.me login when prompted for the EFTPS site, and agreed to allow my information to be shared with the IRS site.  Then it allowed me to login using my client's information to access their account.  I've only done this for one client, so I haven't checked to see if it remembers the login, or if it will allow me to access a different client each time I log in.  If you have an ID.me login, you may be able to access your clients' accounts..... Okay, I just tried to login to EFTPS again after closing out the webpage, and it didn't even send me to ID.me, just went straight to the EFTPS login, so it "remembered" me?  By the way, I won't use Login.gov because I recall they lied about services and charges to clients and were subject to a hearing on the matter back in March.