You should report the K-1 only on your personal tax return with regard to the business. Your business income and expenses should be listed on the corporate tax return, including the home office expense.
You calculate the home office expense and enter the total on the S corporation tax return as a single entry, you don't include the home office form 8829, as that is just for a sole-proprietor reporting on schedule C.
Since you are a shareholder in a corporation and an employee thereof, you should not report any of your business expenses on your personal tax return on schedule C.
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