Box 13 on schedule K-1 is labeled as "other deductions". It typically has items such as code H (interest expense), line 9 on schedule A, code W (other misc deducts) line 16 on schedule A with 2% AGI limit.
These total up to increase you itemized deductions. So to answer your question, most items in Box 13 increase your itemized deductions and offset income.
My question regarding box 13 code AE is why this shows on line 6 (other taxes)?
I don't know of a scenario where code AE would be considered a tax and show up on line 6 of schedule A.
