Yes. That is the only way. And by the way. They won't be giving you much (if any) money from their returns. How do I know? They're still broke. They need the money.
Golden Rule Number One: Don't Loan What You Can't Afford to Lose. ('cause unless you loaning to the most responsible person in the universe, you're gonna lose the money).
Here are a few ways to say no:
If you're strong:
1) When you get a text, NEVER respond to it. EVER.
2) When someone asks, say, "No". Don't discuss it further.
If you feel you need to justify yourself:
3) Say, "Sorry, I do not have the money." Lie if you want about reasons why you don't have the money. But honestly, unless you're rich and have your entire retirement, emergency fund, and lifelong budget securely in place, you really don't have the money for this. And if you do, then just keep lending and don't battle yourself over it.
4) Use the fact that they will not give you their tax refund (and they won't) as your excuse to stop loaning. Stick to it. Wait for proof if you must that you're not getting re-payed, or start the "no loans until I'm paid back in full" rule now. Don't worry, you'll never have to loan again.
If you want to prevent confrontation:
5) Out of the blue, just say, or text (hee hee) "Hey, Guys, just so you know, starting NOW in the new year, I'm not loaning out anymore money. I am saving for something for myself, and I can't and I won't. So don't ask."
Don't discuss it further.
Puhleez, no one even asks me for money because they know I would never say yes. (unless it was my most trusted friends-who have yet to need the help) Likewise, I never borrow from anyone.
You're only doing this because you don't want to be made to feel bad. you know you're not helping them by doing this. They would not help you if the shoe was on the other foot.
Stop.