The IRS will probably change it for you. Do not amend unless the letter and IRS instructed you to. An amended return in response to an audit letter must be sent to the address on the letter and include the case number. If you just send an amended return then it will take about 6 months to process and never get to the department doing the review of your tax return.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**