See the snippet from the Schedule K-1 instructions to section J:
Generally, the amounts reported in item J are based on the partnership agreement. If your interest commenced after the beginning of the partnership's tax year, the partnership will have entered, in the Beginning column, the percentages that existed for you immediately after admission.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
