In my 54 years of tax preparation I have not seen one case where I could save people money on their  income tax returns by using married filing separately. How ever in response to an earlier post that I made it is my understanding that some of you have been able to save clients money by using  MFS. Under what circumstances were your clients under that my clients were not that you were able to save them money this way because I am simply dumfounded how this can work and under what circumstances.