I bought a lenovo tablet and I don't have box or receipt telling Mr can't activate what can I do

The store would have put the code on the receipt when you bought it. If you lost the receipt then you need to contact the store. If aquired from a 3rd party contact them for code. We will not help bypass anti-theft measures.

Go to Lenovo.com and enter the service tag number from the tablet.

if you purchased it recently you may be able to go to the store and exchange it , that if you bought it within a certain time because , comfirmation of you purchasing it will be into the computers at the store, if the problem still presist you can purchase a new one here they are lots of great deals and sales this time of year>>www.discountbargainprices.com

notify seller or nextbook

if bought with credit card you can go back to store for a copy . nexbook can give new code.

Call or go back to the store because they have duplicate of the receipt or you can find someone to crack it, as you can't.

Hey! sorry but you will need to enter that appleID password to reactive the iPad. If you still have the original receipt you can call apple and have them start the recovery process.

You can check out your manual here
Tablets Series A10 70 Tablet Lenovo Support US

I would take it back to the Kmart & request to speak to the Boss tell them you got it as a present & explain that its messed up & try to get another one.