In most situations, you do not need a tax lawyer to help you with an audit. Keep in mind that many audits are chosen randomly, and you may not have a problem with the IRS at all. Hopefully, you've kept meticulous, organized records and you'll likely manage the audit with no problems. The first thing to do is to find all records that justify everything included in your business return. Gather copies of your:
Electronic transactions records
Bank statements, canceled checks, and receipts
Accounting ledgers and journals, if you have them
Business calendar and appointment books
Records for partially claimed items such as mobile phones and your personal vehicle
Travel and expense records, if any
The better organized you are, the better off you'll be and the faster the audit will go. If the audit brings up legitimate issues and you need to appeal your audit, you may want to hire a tax lawyer or CPA to help you navigate the appeal.