1. If you are creating sales invoice for new customer follow below steps
2. Go to Set-Up → Customers
3. Click on ‘Add Customer’
4. Enter the required details. Click on ‘Change’ button under ‘Credit Limit / FA. Enter the credit limit for this customer. If you want to have common credit limit for all the customers mark the checkbox ‘Use System Default Credit Limit’ and click on ‘Save’.
(To set same credit limit for all the customers go to Set-Up → Settings → General → ‘All Documents’ tab and enter ‘Default Credit Limit for Customers’)
5. Add the items in invoice screen and click on ‘Pay Now’.
6. Select ‘Approved Pending’ payment mode and enter the amount that is pending to receive and click on ‘Save Invoice’ or ‘Save & Print Invoice’.