removing old account

V530 Said:

"removing old account: how do I remove icloud lock on an ipad 8th generation without old owners information?"

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You can't.

So, either find the original owner, or it's workless to you.

If this was a used item you purchased from whomever, then it seems like a scam (though a full assumption, on my part). So, contact the seller, requesting a return.

Here are the Apple support pages that outline the Activation Lock - and the only mechanisms by which it can be turned off:

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

Turn off Activation Lock – Apple Support

As you will discover, unless you are the owner of the AppleID that was last used to activate the device, you’ll not be able to defeat or bypass the Activation Lock. With documentary evidence that you are the original owner (such as sales receipt showing the serial number), Apple may be prepared to assist - otherwise they and nobody here will be able to help you.