We cannot see what you are doing---but I suspect the way you are just trying to "split up" the joint return and turn it into separate returns is flawed. You may be switching the names but you could be keeping the same income in the same spots in the software and are getting inaccurate results. Doing it correctly will take longer---but literally just prepare a return that is MFS for each spouse from scratch to compare to the joint return. You have that flexibility with desktop software.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
