Why did I receive Form 3921?
If you exercise Incentive Stock Options ("ISOs"), you will receive Form 3921 from your employer by January 31 of the following year.
I received Form 3921, what next?
Verify that the information on Form 3921 is accurate with your records. Box 4, the fair market value on the exercise date, will be provided by your employer.
Box 1: The date that your options were granted
Box 2: The date you exercised your options
Box 3: The exercise price on your options
Box 5: The number of options exercised
Once confirmed, file Form 3921 along with the rest of your taxes.
I haven't received Form 3921, what should I do?
Contact your employer. Your employer will send Form 3921 to the IRS as well, so it is important that you make an effort to file the form with your personal taxes as well.
I filed my taxes, do I need to keep Form 3921?
Yes. ISOs impact your taxes twice not only when you exercise, but also when you sell the stock you received after exercise. Form 3921 will be useful when you eventually sell the stock so that you may calculate the tax impact of the sale.