If your employee count is increased beyond the limit you have subscribed for then you need to upgrade your subscription
Simply follow the steps below
Step 1: Go to Administration-->Billing Details.
Step 2: From the Billing overview tab, click on the 'Manage Subscription' button.
Step 3: Enter the employee count you want to add to your subscription.
Step 4: Select the Subscription Type (Monthly or Yearly) and review the subscription details which are displayed on the right-hand side of the screen .
Note: If your company's subscription is already a yearly subscription then the only yearly option will be available for you.
Step 5: Click the review button to review your subscription
Step 6: After reviewing click on the "Confirm & Pay" button.
Step 7: You can complete the payment by Credit / Debit Card or UPI / QR Scan or Net Banking
Hope your query is answered !!!