As of June 10, 2022, we had 11 million unprocessed individual returns which include returns received before 2022, and new tax year 2021 returns. Of these, 1.9 million returns require error correction or other special handling, and 9.1 million are paper returns waiting to be reviewed and processed

https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue