Presuming you have a Sales Team to boost your business performance, and you want to set your transaction to requires Sales Person information as to its detail. DealPOS provides these features to set it up.
You can try the following method:
Step 1. Go to Setup menu, click more setting, and select module
Step 2. Go to the Sell menu and tick YES to 'Sales Person Required' and Save
II. Sell Menu
After the save was made, you are no longer allowed to use the Sell menu without inputting the Sales Person Information.