Yeah, it's suppose to sync, but whenever I would try to send something from ATX program to the portal, nothing would happen. Maybe they improved it for this year. Also please watch out for any return that you change the address on. Part of the training I went thru was to get all of my ATX clients into the portal data base. That went very smoothly, however whenever I would make a change on the tax return thru ATX (such as address) then you will get a pop up asking if you want to sync with the portal, I said yes of course, but what happened was instead of changing the address in the portal, it changed it on the tax return. I had several of these happen throughout the filing season and didn't figure it out until then end when I counted the number of returns that had been filed with the old address.
Not saying it will happen this year, but check it out. Make sure that before you transmit the return, the address did not change back to the old one.