1099 Forms Guide & Resources
Everything you need to know about filing 1099s, W-2s, and other tax forms for your business
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Overview
File Form 3921 - Exercise of an Incentive Stock Option Under Section 422(b)
Form 3921 is used by corporations to report when an employee exercises an incentive stock option (ISO) under Section 422(b).
Our system makes 3921 eFiling quick, accurate, and IRS-compliant.
What is Form 3921?
Form 3921 reports transfers of stock to employees when they exercise incentive stock options.
Who Must File a 3921 Form?
Corporations must file if they:
- Granted ISOs to employees
- Had an employee exercise those options during the tax year
Information Needed to Complete a 3921
- Corporation details: name, EIN, address
- Employee details: name, SSN, address
- Stock option grant date and exercise date
- Number of shares and fair market value
How to eFile 1099-R Online Easily
- Collect employee ISO exercise details
- Enter corporation and employee information
- Validate with error checks
- File electronically with the IRS
- Deliver copies to employees
IRS 3921 Deadlines & Filing Penalties
- Employee copies: January 31
- IRS eFile: March 31
Why eFile Your 3921 With Us?
- IRS-approved electronic filing
- Built-in error prevention
- Bulk upload support for high volumes
Frequently Asked Questions
What is Form 3921 used for?
To report transfers of stock when an employee exercises an ISO.
Who files Form 3921?
Corporations that granted and had employees exercise ISOs.
Do employees need Form 3921?
Yes, they use it for tax reporting on ISO transactions.
Can I bulk file Form 3921?
Yes, our system supports bulk uploads.
What happens if I fail to file?
The IRS may assess penalties per missing or incorrect form.
Start Filing Your 1099-R Forms Online Today
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