Use this IRS website for the status of a federal amended tax return, Form 1040X, that you printed and mailed to the IRS - https://www.irs.gov/filing/wheres-my-amended-return
The IRS was not processing any paper tax returns for several months due to the pandemic and limited staffing. Then have only just recently started to process approximately 11 million paper tax returns in the order received.
See this IRS website for information - https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue
We’re experiencing delays in processing paper tax returns due to limited staffing. If you already filed a paper return, we will process it in the order we received it.
Do not file a second tax return or contact the IRS about the status of your return.
