Based on the information given she is potentially eligible for a retirement savings contributions credit (Saver's Credit) of up to: $200.
The minimum threshold for single filing status is $31,500 threshold but based on the information given we were told that Erin modified adjusted gross income (MAGI) is $31,000 which is lower than $31,500.
Based on this Erin credit rate is 10% of the amount she contributed to the traditional IRA, which mean that she is eligible for a Saver's Credit of up to $200 calculated as:
Saver's Credit=$2,000×10%
Saver's Credit =$200
Inconclusion she is potentially eligible for a retirement savings contributions credit (Saver's Credit) of up to: $200.
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