how can i charge a credit card transaction on my XE-A106 register?

If you mean credit card payments, you use the CH button at the end of the sale instead of CASH. This will put it in the charge totaliser, so on your daily report, it will show the amount that was paid by credit card (look for CH on your report each day)

-----------------------------------

If anyone needs a Sharp XE-A106 user and programming manual,
c-tech has one here:

http://the-checkout-tech.com/manuals/cashregisters/Sharp_XE-A106_operation_manual.html

Registerman
October 2010