Where do I fill form 3921
When I go to "Other Tax Situations -> AMT , I get the Page "Tell us about your Mortgage"
and then it says you do not have to pay any AMT
Un expert vous aide à faire vos impôts
Nous vous guiderons étape par étape
Obtenez plus de conseils pour les gros changements dans votre vie
Explorez les outils fiscaux, obtenez des conseils et lisez les commentaires
An expert helps with your taxes, or does them for you
We'll guide you step-by-step
Get your T2 corporate return done right, your way
Find extra guidance for your big life moves
Explore tax tools, get tips, and read reviews
Actually you do need to report the exercise of ISO stock if you did not sell all of the stock before year end, and you do that by entering Form 3921 into TurboTax. The interview you need is the "ISO Exercise and Hold" interview that's in the "Investment Income" section. That's where you'll enter your Form 3921 and that's where TurboTax gets its information for the AMT adjustment.
After entering all your other income/deductions/credits information cruise through the "Alternative Minimum Tax" interview that's under the "Other Tax Situations" tab. If you sold some or all of the stock then you can use the Form 3921 to help determine the basis of the stock when you enter the sale via the "Stocks, Mutual Funds, Bonds, Other" interview.
So, enter the Form 3921 if you didn't sell all the stock by year end using the "ISO Exercise and Hold" interview. You can enter the Form 3921 if you sold some or all of the stock during the year and use the ISO "guide me" stock sale interview. Alternatively, if you know the correct basis to use for the sale - which is not the amount reported by the broker on the 1099-B - then you don't need to enter the Form 3921; you simply enter the 1099-B as it reads and then tell TurboTax you need to correct the basis.
Tom Young
Our experts are available on-demand, no appointment needed. Get help all year long with TurboTax Expert Assist.
Explore your optionsEnter your E-mail address. We'll send you an e-mail with instructions to reset your password.
©1997-2026 Intuit, Inc. All rights reserved.
Intuit, QuickBooks, QB, TurboTax, Credit Karma, and Mailchimp are registered trademarks of Intuit Inc. Terms and conditions, features, support, pricing, and service options subject to change without notice.
Security Certification of the TurboTax Online application has been performed by C-Level Security.
By accessing and using this page you agree to the Terms of Use.
© 2026 Intuit Canada ULC or its affiliated companies. All rights reserved. Intuit, QuickBooks, QB, TurboTax and ProFile are registered trademarks of Intuit Inc. Terms and conditions, features, support, pricing, and service options subject to change without notice.
Copyright © Intuit Canada ULC, 2026. All rights reserved.
© 2026, Entreprises Intuit Canada ULC ou ses sociétés affiliées. Tous droits réservés. Intuit, QuickBooks, QB, TurboImpôt et ProFile sont des marques déposées d’Intuit Inc. Les modalités, prix, fonctions et options de service et de soutien peuvent changer sans préavis.
© 2026, Entreprises Intuit Canada ULC. Tous droits réservés.