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Why this happens
income is reported as wages on your .
The same shares' sale is reported on the , frequently with $0 or missing basis.
If you do not adjust basis, the sale's gain includes value already taxed as wages.
The result feels like double taxation, but it is really one missing adjustment.
What to check
- Whether the amount is in your wages.
- The basis the reported for the sale.
- Your records for the correct basis.
- Whether software imported $0 basis and computed a large gain.
- That, after adjustment, the gain reflects only the price change since .
Common mistake
Example scenario (hypothetical)
Illustration only, not your tax situation.
When to get help from a tax pro
- You already filed before noticing the issue.
- Totals do not reconcile after adjusting basis.
- You have many lots and partial sales.
- You received corrected forms.
Related calculators
Related pages
- Why Is My RSU Cost Basis Zero?
Zero basis on 1099-B usually means the broker did not link your vest wage income. not that tax was skipped.
- How to Adjust RSU Cost Basis
Basis adjustments connect vest wage income to later sales. document FMV from vest records.
- Are RSUs Taxed Twice?
Vest income and later sales can both show up on tax forms. that is not always double tax on the same dollars.
For learning, not filing
Grants, employers, and states all differ. Use your own documents and a qualified tax professional before you make decisions from this guide.
