Deductions & credits

Perhaps so.  Review the qualifications for both credits.

This IRS FAQ reports the qualifications for claiming the Earned Income Tax Credit without a qualifying child. 

Claim the EITC Without a Qualifying Child

You are eligible to claim the EITC without a qualifying child if you meet all the following rules. You (and your spouse if you file a joint tax return) must:

• Meet the EITC basic qualifying rules
• Have your main home in the United States for more than half the tax year
  • The United States includes the 50 states, the District of Columbia and U.S. military bases. It does not include U.S. possessions such as Guam, the Virgin Islands or Puerto Rico

Not be claimed as a qualifying child on anyone else's tax return

• Be at least age 18 at the end of the tax year (usually Dec. 31)
  • The minimum age to claim the EIC is generally age 19; however, if you are a qualified former foster youth or a qualified homeless youth, you need to be at least age 18.
  • If you are a specified student (other than a qualified former foster youth or a qualified homeless youth), you need to be at least age 24.

This IRS FAQ reports the qualifications for the third stimulus payment and the Recovery Rebate Credit.

The qualifications for the third stimulus payment are:

• you were a U.S. citizen or U.S. resident alien in 2021, 
• you were not a dependent of another taxpayer’s 2020 tax return, and 
• you have a Social Security number.

 There are income limitations are if your adjusted gross income (AGI) is more than:

• $150,000 if married and filing a joint return or filing as a qualifying widow or widower
• $112,500 if filing as head of household or
• $75,000 if filing as a single or as married filing separately. 

If you did not receive the third stimulus payment, you may receive that amount through a Recovery Rebate Credit found on line 30 of the 2021 Federal 1040 tax return.