diff --git a/src/dealer-claim/components/request-detail/IOTab.tsx b/src/dealer-claim/components/request-detail/IOTab.tsx
index 92e734b..0ea46df 100644
--- a/src/dealer-claim/components/request-detail/IOTab.tsx
+++ b/src/dealer-claim/components/request-detail/IOTab.tsx
@@ -70,7 +70,11 @@ export function IOTab({ request, apiRequest, onRefresh }: IOTabProps) {
   const budgetTracking = apiRequest?.budgetTracking || request?.budgetTracking || {};
   const budgetStatus = budgetTracking?.budgetStatus || budgetTracking?.budget_status || '';
   const internalOrdersList = apiRequest?.internalOrders || apiRequest?.internal_orders || request?.internalOrders || [];
-  const isAdditionalBlockingNeeded = budgetStatus === 'PROPOSED' && internalOrdersList.length > 0;
+  const totalBlocked = useMemo(() => {
+    return internalOrdersList.reduce((sum: number, io: any) => sum + Number(io.ioBlockedAmount || io.io_blocked_amount || 0), 0);
+  }, [internalOrdersList]);
+  
+  const isAdditionalBlockingNeeded = budgetStatus === 'PROPOSED' && internalOrdersList.length > 0 && (estimatedBudget - totalBlocked) > 0.01;
 
   const [ioNumber, setIoNumber] = useState('');
   const [fetchingAmount, setFetchingAmount] = useState(false);
@@ -385,7 +389,14 @@ export function IOTab({ request, apiRequest, onRefresh }: IOTabProps) {
                     min="0"
                     step="0.01"
                     value={amountToBlock}
-                    onChange={(e) => setAmountToBlock(e.target.value)}
+                    onChange={(e) => {
+                      const val = e.target.value;
+                      if (parseFloat(val) < 0) {
+                        toast.error('Amount cannot be negative');
+                        return;
+                      }
+                      setAmountToBlock(val);
+                    }}
                     className="pl-8"
                   />
                 </div>
diff --git a/src/dealer-claim/components/request-detail/modals/DealerCompletionDocumentsModal.tsx b/src/dealer-claim/components/request-detail/modals/DealerCompletionDocumentsModal.tsx
index 88a8264..6d9a2bc 100644
--- a/src/dealer-claim/components/request-detail/modals/DealerCompletionDocumentsModal.tsx
+++ b/src/dealer-claim/components/request-detail/modals/DealerCompletionDocumentsModal.tsx
@@ -273,8 +273,14 @@ export function DealerCompletionDocumentsModal({
         if (item.id === id) {
           let updatedItem = { ...item, [field]: value };
 
-          // Re-calculate GST if relevant fields change
           if (['amount', 'gstRate', 'cgstRate', 'sgstRate', 'utgstRate', 'igstRate', 'quantity'].includes(field)) {
+            // Negative amount validation
+            const numValue = parseFloat(value);
+            if (!isNaN(numValue) && numValue < 0) {
+              toast.error('Value cannot be negative');
+              return item;
+            }
+
             const amount = field === 'amount' ? parseFloat(value) || 0 : item.amount;
             const quantity = field === 'quantity' ? parseInt(value) || 1 : item.quantity;
 
@@ -523,6 +529,13 @@ export function DealerCompletionDocumentsModal({
       return;
     }
 
+    // Check for negative amounts
+    const hasNegativeAmounts = expenseItems.some(item => item.amount < 0 || item.quantity < 1);
+    if (hasNegativeAmounts) {
+      toast.error('Please ensure all amounts are non-negative and quantity is at least 1');
+      return;
+    }
+
     // Filter valid expense items
     const validExpenses = expenseItems.filter(
       (item) => item.description.trim() !== '' && item.amount > 0
diff --git a/src/dealer-claim/components/request-detail/modals/DealerProposalSubmissionModal.tsx b/src/dealer-claim/components/request-detail/modals/DealerProposalSubmissionModal.tsx
index 8530d9d..78501a1 100644
--- a/src/dealer-claim/components/request-detail/modals/DealerProposalSubmissionModal.tsx
+++ b/src/dealer-claim/components/request-detail/modals/DealerProposalSubmissionModal.tsx
@@ -437,8 +437,14 @@ export function DealerProposalSubmissionModal({
         if (item.id === id) {
           let updatedItem = { ...item, [field]: value };
 
-          // Re-calculate GST if relevant fields change
           if (['amount', 'gstRate', 'cgstRate', 'sgstRate', 'utgstRate', 'igstRate'].includes(field)) {
+            // Negative amount validation
+            const numValue = parseFloat(value);
+            if (!isNaN(numValue) && numValue < 0) {
+              toast.error('Value cannot be negative');
+              return item;
+            }
+
             const amount = field === 'amount' ? parseFloat(value) || 0 : item.amount;
             const quantity = 1; // Quantity is now fixed to 1
 
@@ -524,6 +530,18 @@ export function DealerProposalSubmissionModal({
       return;
     }
 
+    // Check for negative amounts or invalid days
+    const hasNegativeAmounts = costItems.some(item => item.amount < 0);
+    if (hasNegativeAmounts) {
+      toast.error('Please ensure all amounts are non-negative');
+      return;
+    }
+
+    if (timelineMode === 'days' && (parseInt(numberOfDays) <= 0 || isNaN(parseInt(numberOfDays)))) {
+      toast.error('Please enter a valid number of days greater than 0');
+      return;
+    }
+
     // Calculate final completion date if using days mode
     let finalCompletionDate: string = expectedCompletionDate || '';
     if (timelineMode === 'days' && numberOfDays) {