When you first use the DealPOS system, there are 4 payment methods that you can use for the first time, namely: Cash, Debit Card Credit Card and GoPay QRIS. You can also add other payment methods that you can use later when making sales on the sell menu.
Step 1. Go to Setup Menu - Click Add Button

Step 2. Input Payment Method Form - Click Save

You can check the payment method that you have created in the payment method list or when you pay in the sell or buy menu.
Payment Method List

Sell

Add Payment Method Tutorial Video
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To add tax calculation options, check the following articles: Create Single Tax And Multiple Tax
If the payment method you received has a surcharge, you can add it here: Set Surcharge at Payment
To add a category of payment methods, you can check this article: Adding Payment Method Group