It takes 5 business days to post.

Click on order status / account at the top of Bud's home page. That will bring up your three most recent orders. There will be 3 red buttons to the right of the order number and amount. They are: payment, add/update FFL, view order. Click on the payment button. That will bring up the page showing the current status of all payments you have made (In the small black-lined box). If it still isn't there call Bud's customer service.

It looks like it has not on the main part but if you go to the "Payments" section on your order (it should be a button to the left of the order in order history), you should see it there. The main balance stayed the same for me but in the payment section is where I saw the reducing amount due after payments. I would check there and if it has been 48 hours since you paid, I would contact them via the "Chat Now" feature. Layaway is great here and I just used it.

Sometimes it take it a bit to post & you have to click on the make a payment tab to see it deducted from your total