People pay their taxes all year long, dumbass. what they do in April is file their taxes, which means they calculate how much they were actually obligated to pay than then either pay the balance if they didn't pay enough or get a refund if they paid too much.
Which is why you miss the point.
Tax revenues are lowest in February- that's when people get their refund checks.
Tax revunues are high in April, that's when those of us who have to pay money do so.
Again, I just have to conclude you aren't very smart.