To Convert Delivery Challan to Sales Invoice in Android please follow below mentioned steps:
Step 1: Go to “Bills”.
Step 2: Click on “More” Option.
Step 3: Click on “Delivery Challan Option”.
Step 4: Select the “Delivery Challan” and click on “Three Dots”.
Step 5: Select the “Convert Option”.
Step 6: Click on “Convert to Sale”.