What this line means
The sum of lines 1 and 2 — your alternative minimum tax plus any excess advance premium tax credit repayment. This total flows directly to Form 1040 line 17. If both line 1 and line 2 are zero, this line is zero and you do not need to attach Schedule 2 Part I to your return.
Does this apply to you?
- You owe alternative minimum tax calculated on Form 6251
- You must repay excess advance premium tax credits calculated on Form 8962
- You owe both AMT and a premium tax credit repayment in the same year
Easy to overlook
Schedule 2 Part I must be attached even if only one line has an amount If you owe AMT but have no premium tax credit repayment (or vice versa), you still complete Part I and enter the total on Form 1040 line 17. 1 Tax software handles this automatically, but paper filers sometimes enter the amount on Form 1040 line 17 without attaching Schedule 2, which can delay processing. General filing pattern — Schedule 2 Part I omitted from return
This amount increases your total tax before credits and payments The Part I total adds to the tax calculated on your Form 1040 (line 16) to produce your combined tax liability. 2 Credits on lines 19-21 of Form 1040 then reduce this combined amount. Understanding that AMT and premium tax credit repayments stack on top of regular tax helps you estimate your total liability before applying credits. IRS Schedule 2 Instructions — Line 3
Watch out for this
Entering the Part I total on Form 1040 line 23 instead of line 17. Line 23 is for Part II of Schedule 2 (other taxes). Swapping the two amounts puts AMT where self-employment tax belongs and vice versa. Both lines feed into total tax, but placing them on the wrong lines causes the IRS to question the return.
Footnotes
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IRS Schedule 2 (Form 1040) Instructions, Part I. https://www.irs.gov/instructions/i1040s2 ↩
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IRS Schedule 2 (Form 1040) Instructions, Line 3. https://www.irs.gov/instructions/i1040s2 ↩