To check the purchase stock in the Store Module, you can follow these steps:

1. Go to the Store Module and click on "Purchase."
2. Select "Stock" from the available options.
3. Enter the Transaction Number and Challan Number related to the purchase.
4. Click on the "Search" button to initiate the search.

Alternatively, you can click on "Advanced Search" to explore additional search options if needed.

Following these steps will allow you to retrieve the purchase stock information based on the provided Transaction Number and Challan Number. This will help you track and manage the stock inventory in your store effectively.