I have an Authorize.net merchant account. I want to process a client payment, but the trouble is that the box where you put in the numbers for a credit card is NOT there.

The reason the box is not displaying for the credit card number is perhaps because the currency for this is client is other than the US Dollar (like the Canadian Dollar), and your system will only process USD (US Dollars), since you are set up with Authorize.net. If you wanted to process international currencies, you would need to set up a PayPal account that utilizes their international currency feature.

You just need to change the currency setting for this client. To do so, click on CONTACTS > CONTACT NAME > “Edit info” > Billing Settings. Here you'll find the pull down menu for currency: choose USD $ and click on “Save Contact”. If you have former invoices with a currency that is not the client's currency, you will have to recreate them in order to reflect the correct currency.