I need to know if I claimed earned income tax credit on my taxes this year. I may have accidentally done that and I didn't mean to

You don't really claim Earned Income Tax Credit, if you qualify, the program automatically adds the credit to your return.  

 

The Earned Income Tax Credit, EITC or EIC, is a benefit for working people with low to moderate income.

 

your earned income and Adjusted Gross Income (AGI) may not exceed:

• $15,570 if you're not claiming a qualifying child ($21,370 if filing jointly);
• $41,094 if you're claiming 1 qualifying child ($46,884 if filing jointly);
• $46,703 if you're claiming 2 qualifying children ($52,493 if filing jointly);
• $50,162 if you're claiming 3+ qualifying children ($55,952 if filing jointly).

https://ttlc.intuit.com/community/credits-and-deductions/help/what-are-the-qualifications-for-the-ea...

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The IRS expects the earliest EITC/ACTC related refunds to be available in taxpayer bank accounts or debit cards starting February 27, 2018, if these taxpayers chose direct deposit and there are no other issues with their tax return.