I just had the same issue.  I was told you can't efile ahead must go back into system each quarter and efile that estimate.  I don't want responsibility to remember and go back into the system.  I removed the efile estimates and advised my client to set up payments online for the rest of the year.  .I sent him a youtube video. 

https://www.youtube.com/watch?v=T9cDnyqaqTQ