Tax Reform: Before and After Full Size Version Share | Have A Question About This Topic? Name Email Address Message Thank you! Oops! Related Content The Facts About Income Tax Millions faithfully file their 1040 forms each April. But some things about federal income taxes may surprise you. Red Flags for Tax Auditors Here are six flags that may make your tax return prime for an IRS audit. Comparing Investments This calculator compares the net gain of a taxable investment versus a tax-favored one.