Some jurisdictions require the collection of sales tax/VAT for services or sales. It would be nice to add the option to include sales tax in the Collect Payment form. This could possibly be configured as a system setting so that it could be turned on or off and a percentage defined.
This would be helpful, but for us, we would need it to be able to be customized by debit type. For example, we have merchandise we sell, which we collect sales tax for, but we also have some service fees which we aren't required to collect sales tax for. In addition to sales tax, we would really like to see a way of calculating a fee for credit card sales as a percentage of the total sale, but that might be a separate enhancement.