What is the likelihood of IRS referring to my 2019 pending1040x for stimulus eligibility versus my completed 2018 on file?

[TuneMaster03]

Reason being my wife had an ITIN in 2018 but received her SSN in 2019 but I goofed and forgot to update it on our 2019 return hence the need to file amended with the SSN instead of ITIN.

[AmeliesUncle]

They probably won't.  But when you file your 2020 tax return, you should get the credit then.