IRS - received notice of refund adjustment (CP12)

Filed taxes as non resident and received a notice of adjusted refund which was $500 more than what was originally owed by IRS. Reason specified - you calculated child tax refundable/nonrefundable credit incorrectly. Though I did not calculate it myself but used taxact. My question now is do I need to file an amendment to my Illinois state taxes? And will it increase my state tax refund?