Dear E Commerce,
The Tax question is the easiest one. If this is a Turks company which does business only in Turks and have nothing to do with the US, of course, it does not pay tax in the U.S.
However, as individuals, U.S. citizen taxpayers are taxed with worldwide income.
Since you are e commerce, can you use Pay Pal? Will Discover card work with you? Or ING?
If you are on line only, how do you enter credit care 1 by 1?
Do you mean that you have credit card business but you are doing business as retailer on a geographical location?
Can you find a local CPA firm with international presence but based in the US there to ask them? You must not be the only business with the issues.
However, I would suggest you not to establish a mother (holding) company in the U.S. just for the purpose of using the credit cards. This is not a good idea. I don't know much about the environment in other country. But in the U.S. for tax or business regulatory organization and homeland security rules and regulations, any shield companies like this type can cause you big problems unexpectedly. When I visited Nevada here, they consider CPA opening an account is a risky behavior. Can you believe it?
Can you find another Europe country closer to Turks if this is the only way you can process a credit card.
The best way is actually use the local way completely since that is where you are.
Please feel free to follow up with questions. Otherwise, I am ready for you to evaluate my answer with your satisfaction level.
Fiona Chen, MPA, Ph.D., CPA, ABV, CFF, CITP