If you are person or entity that receives a Schedule K-1-P from a partnership or an S corporation, then you must attach a copy of Schedule K-1-P to your Illinois income tax return in order to claim any credit or subtraction you received from a partnership or S corporation. Please be sure to keep a copy for your files!
If you are the partnership or S corporation that completes Schedule K-1-P you should send copies to the partners and shareholders and maintain copies in your files. However, it is not necessary for you to submit copies of Schedule K-1-P to the department. The partners or shareholders will do this when they claim the amounts on their income tax returns.