I would like to know this as well.  I have very large partnership's with over 300 partners.  These returns are required to be e-filed, but the pdf attachment for the K-3's is too large to e-file.  These returns have been sitting patiently waiting to e-file with the K-3.  This is also holding up the State returns where you must e-file the Federal first.

Is the IRS really accepting these via E-File and therefore at this point it is just a Lacerte issue or is the IRS not yet accepting E-Filed K-3's?