Deductions & credits

@Mytaxs And....there is also the issue of stimulus payments.   You cannot both receive stimulus payments for those children.   Which one of you got the EIP  payments for the children---did your sister use the recovery rebate credit on her return and get EIP payments for claiming the children?   Or  did you receive the 1st and/or 2nd EIP payments for claiming them?   Did the IRS send the 3rd one of $1400 per child to your sister after she filed a 2020 return and claimed them?

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