Box 11 on a partnership schedule K-1 would indicate that you have income that is not reportable on line 1 to 10 of the schedule, where it would automatically be transferred to the proper line on your for 1040, individual income tax return. As such, you need to enter the amount on the appropriate form or schedule, depending on what type of income is being reported.
If you can give us a description of the income reported we may be able to tell you where to report it elsewhere on your tax return.