Amended tax return status unknown

The current processing time is more than 20 weeks for both paper and electronically filed amended returns.  See their processing status dashboard for timeframes.

Additionally, calling the IRS will not speed up return processing.  The phone and walk-in representatives can only research the status of your amended return 20 weeks or more after you've mailed it; or if Where's My Amended Return? itself has recommended you contact them.

IRS Frequently Asked Questions for Amended Returns