The IRS does HUB or BETA testing every year. ProSeries does not participate in this program but most every other software provider does. BETA testing began on 1/15/19, so if you had everything ready and entered into a participating software provider like Turdo tax or prepared at the big nationwide Tax stores, the IRS pulls those returns for testing and if it works, those taxpayers get their refunds, usually, before most people.
Every year clients will call saying so & so got their refund already and tax season hasn't even opened, that's just the way the system works. If ACKS are being received, that's a good sign for the rest of us.