709 form ack

Hi there,

I had posted the 709 form to Department Of Treasury, IRS center, Internal Revenue Service Center, Kansas City, MO - 64999 via certified mail.  USPS Tracking only shows below. Does it mean it reached or it did not reach? How do I find out? Thank you!

 

March 28, 2020, 10:53 pm
Available for Pickup
KANSAS CITY, MO 64999 
Your item arrived at the KANSAS CITY, MO 64999 post office at 10:53 pm on March 28, 2020 and is ready for pickup.