Form 1040-X, ‘FedIncmExSocSecRRTAWthldTxAmt’ in ‘CorrectNumberOrAmountGrp’ must be equal to the amended Form 1040, ‘WithholdingTaxAmt’ plus (+) Schedule 3 (Form 1040),
‘ExcessSocSecAndTier1RRTATaxAmt’.

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