BRASILIA, March 22 (Reuters) - Brazil’s federal tax revenue rose to 127.75 billion reais ($23.1 billion) in February, the federal tax service said on Monday, up 4.3% in real terms from the same month last year. That was slightly more than the 124.9 billion reais forecast in a Reuters poll of economists and brought tax revenue in the first two months of the year to 308 billion reais, up 0.8% in real terms on the same period last year.