TaxAct implemented an e-file qualification that prevents you from filing Form 8962 Premium Tax Credit (PTC) if IRS Publication 974, Worksheet X is used on Line 28. This was done because IRS business rules do not allow for this scenario, and if it were e-filed, you would receive e-file rejection error F8962-043-02.

Rejection code F8962-043-02 states:

If Form 8962, 'TotalExemptionsCnt' (line 1) has a non-zero value, then 'AdditionalTaxLimitationAmt' (line 28) must be equal to the tax limitation amount from the Repayment Limitation table (see Form 8962 instructions) based on 'FederalPovertyLevelPct' and the filing status on the return.

When IRS Pub 974, worksheet X is used, a different repayment limitation is used on Line 28 so the amount will NOT be equal to the amount in the table from the Form 8962 instructions; it will violate this business rule.

If you want to use worksheet X, you need to paper file the return. The corresponding state return also needs to be paper-filed (with the exception of CA).

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