Rajvansh, you are correct. In case of qRFC what you need is not possible unless you make a call back to the called system. What Adam suggested is a aRFC and is actually a good option in case you need results back.
Now since you referred to SO creation (considering that is exactly what you need), you should be able to make a call back from UE_SAVE_DOC and achieve what you need.
Thanks,
Vikram.M