Code to Close worksheet where data is being copied from

I have macro that is copying data from worksheet A to Worksheet B. When the Macro finishes copying I want it to close worksheet b. The Macro runs under the Worksheet A. I've tried putting

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but it is not closing anything. How can I close worksheet B?

It's hard to say without seeing the full code. The code that you posted closes the active workbook without saving, but your post talks about worksheets