Hi Tennisjaf,
Thank you for participating in the Apple Support Communities. We understand you're unable to print from your iPhone and iPad since the update. The iPhone and the printer must be on the same Wi-Fi network. You may want to turn your printer, iPhone, and iPad off and back on again. If that doesn't help, try disconnecting it from your Wi-Fi network and connecting it again. You'll likely need to refer to your printer manual for instructions since every printer is different. You may want to check if you have documents in the queue and cancel them in order to try again. This article explains how: Print from iPhone.
"See the status of a print job
Open the App Switcher, then tap Print Center.
The badge on the icon shows how many documents are in the queue.
To cancel a print job, select it in Print Center, then tap Cancel Printing.
Print a document
Tap
,
, or
(depending on the app you’re using), then tap Print. (Swipe up if you don’t see Print.)"
We hope this helps.
Take care.