I got a simple question wrong!

Ask:
… on my Chemistry quiz and its killing me!
I don’t get why this is wrong.
NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2
When asked to balance it, I answered that it *was* a balanced equation!
On the left we have 1 Na, 2 H, 3 O, 1 Cl…
On the right, 1 Na, 2 H, 3 O, 1 Cl…
Why did I get this wrong?? I’m going nuts!

Answer:
I'm not going to kill myself over a chemistry quiz...tho I am pretty bummed. Anybody (real) out there know what I'm missing?
Answer:
Seems balanced to me. What did your classmates answer to this question?
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