"In 1980, the last year before the tax cuts, tax revenues were $956 billion (in constant 1996 dollars).
Revenues exceeded that 1980 level in eight of the next 10 years. Annual revenues over the next decade averaged $102 billion above their 1980 level (in constant 1996 dollars).
Notice the gymnastics the Right has to do to get the loss in revenue from St Ronnie's tax cuts to look better. 1981 was actually the last year of revenue before the Reagan tax cuts, which were retroactive to July, so if you take the 1981 revenue and add back the retroactive tax cut you will have the actual revenue for 1981 before tax cuts and that would be the real base of $1,054.8 billion from which to calculate the lost revenue from Reagan's tax cuts. With those real numbers it took 6 years to finally increase before tax cut revenue.
The chart from your link: