I just cancelled the previous printer ink and got the stated time on the new printer, possible things could have changed.
I set up a 2nd printer on my account and got the free months for the 2nd printer without issue. Your account will show both printers with independent print subscriptions within the one account
I'm fed up with inkjet printers. They keep blocking. I ended up buying a mono laser printer.
I wouldn't buy a hp again they are real crafty and lock the firmware, making it near impossible to use cheap inks, even refilling the cartridges is not viable
thanks for the info.much appreciated