Will TT automatically combine separate returns for married couple?

My wife and I got married this year after living together for 6.  I want to calculate the returns as "Married Filing Separately" and "Married Filing Jointly" to see which filing status nets us the best return.  If I create 2 individual returns, can TT automagically combine our separate returns into a combined return or do I have to manually create a 3rd, combined return?