Deductions & credits

I  received only 1 stimulus payment in March  2021 for the amount of $1400.  Turbo Tax filled in the Recovery Rebate Credit of $1400 for me, and the IRS disallowed it.  I met all of the qualifications.  My total income was under$72,079, and AGI was just over $65,079.  I am not a dependent on any other person's tax return. I am single, living alone, no children.  Why did the IRS disallow the credit?