Is there any way to merge returns completed by a CPA with those completed by TT?

I've used TT for the past 9 out of 10 years (used a CPA instead 1 time). I'm reporting major changes this year (sold property). Will something be left out of the calculation of key figures given that I'm missing 1 year in TT? Is there a way to merge the return my CPA did with my TT returns?