This says you can check your EFIN status page to make sure your return count matches what your EFIN shows.  I dont think ProSeries has a "report" per se, but you should be able to see how many returns you transmitted and were accepted in Homebase (another reason why you should only ever transmit and download acknowledgments from a single computer)

https://www.irs.gov/tax-professionals/how-to-maintain-monitor-and-protect-your-efin