What is Schedule 2?
Schedule 2, Additional Taxes, attaches to Form 1040 and collects taxes the main form doesn't compute. Part I holds the alternative minimum tax (AMT) and excess advance premium tax credit repayment — what you owe back when marketplace health insurance subsidies outran your actual income.
Part II is the longer list: self-employment tax from Schedule SE, the 10% additional tax on early retirement distributions, additional Medicare tax and net investment income tax for higher earners, household employment taxes (the "nanny tax"), and first-time homebuyer credit repayment, among others.
Who files Schedule 2?
- Self-employed filers — SE tax from Schedule SE lands here, making this one of the most-filed schedules.
- Marketplace health insurance enrollees whose advance subsidy needs reconciling via Form 8962.
- Anyone who tapped retirement accounts early — the 10% additional tax (with its many exceptions) reports here.
- Higher earners subject to AMT, additional Medicare tax, or net investment income tax.
Deadlines
Files with Form 1040 by the April deadline. Because these taxes aren't withheld, they're a common cause of surprise balances — and a reason to revisit estimated payments or W-4 withholding for the following year.
How to fill out Schedule 2
Check Part I triggers
AMT mostly affects high earners with large deductions or incentive stock options — Form 6251 computes it. Form 8962 reconciles marketplace insurance subsidies.
Carry self-employment tax
The Schedule SE result enters Part II — for most freelancers, the only line they use.
Report early-distribution penalties
Form 5329 computes the 10% additional tax and documents exceptions (first home, education, disability, and more).
Add the high-earner taxes if applicable
Form 8959 (additional Medicare) and Form 8960 (net investment income tax) feed their results here.
Total to Form 1040
Parts I and II sum onto the 1040's total tax calculation.