In Absolute, Worksheet A-8-2 is populated either by filtered Physician expense accounts or by manually added External Amounts. If a change is made to the filter or an external amount is deleted from the Worksheet, this can result in Red highlighted line with N/A values on the Adjustments tab, and will not allow the user to mark Worksheet A-8-2 complete. 
To remove this field, select the Delete button on the far right of the line, and then press the 
button to confirm the operation.
This will clear the Red highlighted line with N/A values, and the Mark A-8-2 Physician Expense Complete button will be available.
Once the N/A values are cleared, preparer may choose the option to "Calculate All Adjustments" above the A-8-2 Lines Summary on the Adjustment tab.
Note: For more information on Worksheet A-8-2 review the linked article on the Absolute support website.