How did you get it on line 25b? Didn't you enter a W2? You had exactly 1200 withholding? What was it from? I would wait for a letter from the IRS. They might send you a refund since it wasn't on 25a then later send you a bill for claiming too much on 25b.
Did you file e-File or on paper?
Did you have a w-2 and 1099 ?
If IRS does its job when processing your return it should move amount on line 25b to 25a.
You shouldn't have to do anything.
Actually, it's line 25d that counts.