I claimed 0 dependent on 2019 return. I claimed my parents in 18. I need to make sure the IRS uses my 19 return so my elderly parents qualifies for the stimulus check

My 2019 tax shows in process. I filed single no dependents.My 2018 tax return I  claim my elderly parents.IRS site According to info that we have on file, we cannot determine your eligibility for a payment at this time on both parents. Who would I contact to use my 2019 return so my parents can qualify for the stimulus check?