Step 1: Complementary base pairing.
In DNA, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). Therefore, the complementary strand will have the bases paired accordingly.
Step 2: Conclusion.
The complementary strand for \( \text{ATGCCTGA} \) is \( \text{TCCGAACT} \).
Final Answer:
\[
\boxed{\text{TCCGAACT}}
\]