@AStout
I’m confused 😢
You are saying you have logged in to Now on your laptop, but then you are asking how to log in?
So do you mean that you have opened Now on your laptop, but not actually logged in?
Or that you have logged in using your Now account details, but are being asked to buy a subscription you already have?
If the former, scroll right to the bottom of the Home screen, where you will find My Account as one of the options, and you can input the details of the Now account you have via Amazon, after which things should work OK.
If the latter, come back and ask again, with clarified details of exactly what you are doing, and where it stops working.
A Now subscription paid through a third party like Amazon should be as usable across the whole range of Now supported devices as a Now subscription bought through Now,
Set a Payment PIN on your account so that no-one but you can buy memberships on it.
Check your bank accounts monthly for any other unexpected payments to Now.
That way you can at least nip them in the bud, while you and Now figure out whose fault they are.
