I am a one CPA operation. My wife is my office manager and the only other employee.  I have used Pro Series since 2006 (which is the year I started doing this full time, did it on the side for 7 years before that).  I have wanted to get rid of Pro Series the last 3-4 years.  Especially in 2018.  I probably should more seriously consider it.  Part of it is, I have never used any other professional software.  While I graduated in 1991, I never worked in tax for other companies, so not familiar with other software.