I sent the amendment to where turbo said to send it.
It was a paper filing because this was before electronic amendments were allowed.
In normal times it takes up to 16 weeks or more to process an Amended 1040X return. But these are not normal times.
Sorry the IRS has limited staff due to Covid-19. They just started opening the mail in June that's been stacking up. Back in March the IRS closed their processing centers and stopped processing mailed tax returns. An IRS spokesperson recently said that they have about 11 million pieces of unopened mail. The IRS says....."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." So it may take longer if you mailed in June or later. So you have to keep waiting.
See this IRS page for the latest information
Then once they start opening the mail, After 3 weeks you can track it here,
It is only recently that the IRS even started opening mail that piled up in trailers for months during the pandemic. And you mailed your amended return, of course. So it is possible that your envelope is still in the giant pile of unopened mail. If you used a mailing service that tracked it such as certified mail, you will at least know it was received. It normally takes about 4 month for the IRS to process an amended return, but it is taking a lot longer now. All you can do is check the IRS site for amended returns now and then to see if your return has ever been opened by a human and put into processing. Sorry.