Thanks, Ian!

1400-1500 - An enormous technological leap enables the king to set up a new tax office.

TRUE(?)

The only thing I can cobble together is that Caxton's printing press set up at Westminster (1476) under the patronage of Edward IV. Malory's Morte Arthure printed (1485), the first book in poetic prose in the English language.

And, another bit which said that Richard III introduced reforms in 1484 which included tax collection.

Oh, and 1452 saw the invention of metal plates for printing.