A top White House official said Sunday that criticism of the tax-reform bill is unfair because nobody knows what will be in it — including him.

Economic adviser Gary Cohn said he doesn’t have full details yet, so therefore opponents, including Gov. Cuomo, should hold off.

“When people come out with these definitive statements on what the tax plan is going to do and what the tax plan is not going to do, I find it hard to believe, because we don’t even know what the tax plan is going to look like in its entirety,” Cohn told “Fox News Sunday.”

Cuomo tweeted Sept. 28 that a proposed version of the bill would mean “every region of New York will see a tax increase.”