If you received compensation (1099-MISC) for performing the duties of a personal representative, it should not be treated as self-employment income. 

Answer the 1099-MISC interviews accordingly - no intent to make a profit, not expected to receive in future years and not related to your "main job". 

If any portion of the payment is reimbursement for out-of-pocket expenses (not your time), you can "report" those expenses as "negative Other Reportable Income". Go to the Other Reportable Income interview, the very last interview in Wages and Income (Federal Taxes tab > Wages & Income category > Less Common Income subcategory > Miscellaneous Income sub-subcategory). Enter the full amount of your out of pocket expenses (i.e.  as a negative number (use "minus" sign). Describe as "Personal Representative Expenses".