If you're preparing a 1065, that's from your input for Gross Receipts and Gross receipts for Section 59A(e) (AG) from passthrough K-1 under Schedule K > Passthrough K-1's on the tab for Line 20.

If this is not applicable, you can enter -1 (yes, negative 1, which stands for 0 PTO/Lacerte-speak) on the line for Gross receipts for section 59A(e) [Override], which is on the Less Common Scenario tab under Schedule K > Other Schedule K Items > Other Schedule K Items.  This will eradicate the computed amount and what's available for Special Allocation.