How can I check the status of my 2018 tax refund when it's overwritten by 2019 status?

According to turbo tax, the 2018 federal tax return was filed and accepted. I received the mail long time ago and tried to follow the instructions but I couldn't verify my address (I was living in dorm and had no credit card) and I forgot about it over time. Now that I filed a tax return for 2019 and successfully received it early in this year, and remembered about 2018 tax return that I left behind, but I couldn't contact with IRS due to COVID-19; eventhough I was able to contact them recently, I couldn't find any ways to get assist with my specific problem but IRS was keep repeating about my 2019 return status instead of 2018 (maybe due to the same amount).

Are there any ways to check on 2018 tax return to see if I can do anything with it?

I have no access to local IRS office as there are none near my location.