I'm suffering from the same issue described above and wondering if there might be a possible work around.

Is it possible to insert a specific form into a client letter in proseries?

At present I know that letters can be formatted to insert a client's name, the date, the tax due, etc. If you could write a script that inserts the federal and state k1 forms, into the k1 recipient letter, the problem might be solved. Anyone think this is possible?