Welcome to the HP Support Community. I'd be happy to assist you.
You may enroll the printer in Instant Ink whenever you require it. Kindly refer to this document to know how to enroll the printer in Instant Ink.
Once you select your plan and complete the enrollment, you will be sent a welcome kit with Instant Ink cartridges.
The page count will start only when you insert the Instant Ink cartridges in the printer.
I hope this helps! Keep me posted.
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KUMAR0307 I am an HP Employee
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