Can I claim my cell phone bill as a teacher related expense since I use it for parent and school related communication?

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You can only deduct the portion of the phone bill you can document for business/school  use in the event of an audit.

However, you can deduct the entire phone bill if it is dedicated solely for business.

If you have a phone dedicated to your job, you can enter it in the below area:

• Type in 2106 in the search box, top right of your screen, then click the magnifying glass

• Click the jump to 2106 link in the search results

• Follow to prompts and online instructions