Not allowed to state what kind of receipt I wanted

They should have explained this to you when you signed up because
obviously you still don't know the big benefit of the program. If you
got the option to choose what kind of receipt you wanted, then you
have no reason to fear losing it.

You are part of Shop Your Way rewards program. If you need to return
an item, present the product and give them your phone number you used
to sign up. That's all they need to pull your transaction.

Offering e-mail receipt is not for you. Not really. It's just so they
can spam up your inbox and sell off your e-mail.

The screen pops up right after the tender is presented so if you don't
make a selection fast enough and I'm too frazzled to suggest it, I
might do the same thing and hit print as well. There are a lot of
people to ring up these days and far too many silly things to worry
about at the point of sale. I would say 99.5% of the time, people
don't want the e-mailed receipt anyway.

The only store in my area that e-mails receipts is Old Navy. And I
realize the convenience of having a receipt e-mailed to you, but what
about the inconvenience to other customers? It's the busiest shopping
time of the year. It's bad enough that many stores (TARGET!) are
aggressively trying to get people to apply for their credit cards AT
THE REGISTER, which means other customers either have to wait until
the application process is complete, or pack up their carts and move
to a different line, and now we have to wait for someone to give their
e-mail address so they can have their receipt e-mailed? I'm just
picturing someone stopping to think about whether or not they want it
e-mailed, questioning the clerk about it, and then deciding to go
ahead and have it e-mailed. Then there's the time it's going to take
the clerk to enter the e-mail address and have it verified as correct
by the customer.

You are probably in the 1% that doesn't want a printed receipt and the
clerk is probably sick and tired of customers giving her cat butt face
whenever they are presented with that option.

Yes, it's presumtuous of her but in the future, I would just make sure
to voice my preference at the beginning of the transaction to avoid
the situation.