Yes, you can qualify for the Employee Retention Program (ERC) even if you’ve already received a Small Business Interruption Loan under the Paycheck Protection Program (PPP). It is also possible to only benefit from one or the other, and not receiving a PPP loan will not impact your ability to receive the ERC tax credit.
However, the credits from the Employee Retention Program can only be used on wages that were not forgiven by the PPP—if the PPP already covered it, they are not eligible for the tax credit.