It is RARE for the IRS to tell you to amend a return when the original return has not been fully processed and since you left out that Gem in the original question I gave the most likely answer since this year many are jumping the gun to amend returns since the IRS has been delayed in processing the originals and of the tax law changes.
In your situation the time it will take to process the amended return is probably in the 6 months or longer time frame so be prepared to wait that long at least and be thrilled if it comes in sooner.
