If you send a print job to the printer and the printer seems to be spinning its wheels, there is likely a communication issue between your printer and your computer. The first thing you'll want to check is the printer's wireless connection. Printers that have been idle for a while may need to be reconnected to the network or your wireless router. Try restarting your wireless router to get your connection up and running again. You may need to update your printer driver or reinstall it completely to get your printer working. Printer drivers are free to download on your printer manufacturer's website.
A printer's wireless connection can be flighty at times, which can be frustrating when you are in the middle of a critical print job. Keep a USB cable on hand as a back up if your wireless connection decides to get spotty. A USB cable offers a direct connection between your printer and computer, which leaves little room for a communication error. You will need to reinstall your printer installation software with the USB cable in order to start printing with the cable. To do this, just download the printer driver on your printer manufacturer's website and run the set up. When it asks you how you would like to connect your printer select the USB cable option instead of the wireless one.