The SLCSP numbers from the healthcare.gov tax tool are correct because SLCSP is an average cost of plans in your area, whether you are paying directly or receiving an advance premium credit.
However, the IRS runs a check with healthcare.gov to verify the 1095-A entries match and if they do not, they mail a notice to the taxpayer asking for information. It is possible that a mismatch between your return and the 1095-A you have now might cause that to happen. If it does, simply follow the directions in the notice and send them a copy of the numbers from the healthcare.gov tax tool. That should resolve any questions.
You may wish to contact healthcare.gov and ask if they can revise the 1095-A to match the tool. This would lessen the chance that the IRS will route your return into ACA verification and slow down processing. They may be reached at:
1-800-318-2596 (TTY: 1-855-889-4325)
Available 24 hours a day, 7 days a week (except holidays)
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