If you have your own access (username and password) to Point of Sale, you will be able to delete/ remove a product from a Point of Sale document you are busy creating.
NOTE: Learn, How can I create a Point of Sale document (Invoice, Pro Forma, Quote, Job Card, Refund, Sales Order and Consignment Note)
1. In Point of Sale, select/ highlight the product you would like to remove on the left-hand side:
2. Click on the Delete F3 button.
3. The product is removed from the tally.