Balance hydrogen sulfate plus sodium hydroxide

H2SO4 (aq) + NaOH (aq) ------> ?

My first instinct is,

H2SO4 (aq) + NaOH (aq) ------> NaSO4 (s) + H2O (aq)

Is this correct?

Some changes:

H2SO4 (aq) + NaOH (aq) ------> Na2SO4 (aq) + H2O (l)

The important one is the formula for sodium sulfate, which you had wrong.

Balanced:

H2SO4 (aq) + 2NaOH (aq) ------> Na2SO4 (aq) + 2H2O (l)