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Schedule 1-A Guides
Learn, verify, then estimate. Every guide is built from the IRS 2026 draft Schedule 1-A and a worked example reproduced in the calculator.
Featured guide
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W-2 Codes
W-2 Box 12 codes TP & TT →
Where the tips and overtime premium amounts live on your 2026 W-2, and what to do if a code is missing.
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Records
Records to keep →
The pay stubs, 1099s and loan statements that back up each of the four deductions.
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FAQ
Schedule 1-A FAQ →
Draft-form status, filing-separately rules, and what could still change in the final form.
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