If you simply want to delete the column that shows the break time, you can right click and remove column on the T&A report. 

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If you want to not record break time at all, you can use First Check-In / Last Check-out in your daily schedule and 

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not use T&A keys on the device menu as shown below


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For devices without T&A keys, configure as below: 

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For basic T&A configuration please refer to our T&A FAQ below: 

http://support.supremainc.com/solution/articles/24000012682--biostar-1-basic-t-a-faq/en