It looks like the IRS caught the missing W-2 on their own and automatically adjusted your return to match the records in their database. Instead of the $2,346 refund you expected, they calculated your actual tax liability as $888 and subtracted your total withholdings of $1,027, which leaves you with a final refund of exactly $139. The Code 846 on your transcript shows they have already authorized that $139 payment for March 2nd, so that is the amount you’ll actually receive. Since the IRS already fixed the mistake and "resolved" the issue with Code 571, you probably won't even need to file an amendment unless you find another error.
