abcd buyers cart com company custom customization few google help inc indicate inform jarred message page parent paypal processing product questions regarding shopping website xyz

I have a few questions regarding your product. The name of my website is ABCD.com but I will be processing payments through my parent company, XYZ, Inc. Is it possible to indicate this somewhere in my shopping
cart so buyers won't be jarred when they go to Paypal or Google and see XYZ instead of ABCD.com

Sure. Please see "cart customization" in our help page. You will see that it's possible to add a small custom message to the cart. You can use that to inform your buyers about this.