Due to the covid shutdown mail that has tracking on it was being accepted by other IRS owned zip codes and that is noting to worry about. Even if you mail it to the wrong place the IRS will reroute the envelope using internal mail delivery methods it will just take a bit longer.
Right now the IRS is playing catch up with the 11 million + envelopes that piled up while they were closed plus the millions of mail that just keeps coming. They are trying to open the mail in the order it was received so it may take a while for your envelope to come to the top of the pile ... patience will be needed by all this year.
