If you mailed it you may have to wait awhile. In March the IRS closed their processing centers because of the Covid-19 pandemic and stopped processing mailed tax returns. They are just now starting to process them again, but they have limited staff and a huge backlog, so it will be quite a while before your tax return is processed or any status information is available. An IRS spokesperson recently said that they have about 11 million pieces of unopened mail.
See this IRS page for the latest information
https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue
Is it showing up at IRS Where's my refund yet?
https://www.irs.gov/refunds/
