Beginning this weekend, agencies will begin to actively manage the
increasing volume of e-files as we approach the Individual filing
deadline. This agency process, known as "throttling," ensures that both
federal and state e-filing pipelines continue to flow smoothly while
handling the increased volume.
During this period, you can expect
some slower ACK responses than are typical for the rest of the season;
however, slowed agency responses are normal for this time period.