Amended returns can only be mailed but they are not processing mailed returns right now. The mail is stacking up in trailers at the IRS.
See this IRS page for the latest information
https://www.irs.gov/newsroom/irs-operations-during-covid-19-mission-critical-functions-continue
Then after they start opening the mail.......It can take them 16 weeks for the IRS to process amended returns or longer. And they only mail checks for refunds. After 3 weeks you can track it here, https://www.irs.gov/filing/individuals/amended-returns-form-1040-x-/wheres-my-amended-return-1
