Same here.  But I also eyeball the return (not the schedules) quickly in case there's anything glaringly different.

Agree with Anna about the bells and whistles.  It also sounds like UltraTax creates the XML when F.8879 is produced, in which case, they may have a point of comparison.  With Intuit products, my hunch is that the XML is not created until the return is actually sent for efiling.

@ashtonc In case you are not aware, ProConnect Tax does lock the return once it's e-filed.  You can refer to this article for more info: https://accountants.intuit.com/support/en-us/help-article/electronic-filing/lock-unlock-returns-proc...