Go to this IRS website for the status of an amended tax return - https://www.irs.gov/filing/wheres-my-amended-return
Note that the IRS has not processed very many paper tax returns due to the pandemic.
Go to this IRS website for information - https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue
The IRS is not currently able to process individual paper tax returns. If you already have filed via paper but it has not yet been processed, do not file a second tax return or write to the IRS to inquire about the status of your return or your Economic Impact Payment. Paper returns will be processed once processing centers are able to reopen.