The Tax Cuts and Jobs Act (TCJA) has enhanced two depreciation-related breaks that are popular year-end tax planning tools for businesses. To take advantage of these breaks, you must purchase qualifying assets and place them in service by the end of the tax year. That means there’s still time to reduce your 2018 tax liability with these breaks, but you need to act soon.

If you have incomplete or missing records and get audited by the IRS, your business will likely lose out on valuable deductions. Here are two recent U.S. Tax Court cases that help illustrate the rules for documenting deductions: insufficient records and destroyed documents.