"There is no problem for Sri Lankan tax payers," said deputy finance minister Ranjith Siyambalapitiya said Tuesday.
"From now on they can come to the IRD office and make their payments or sort out any tax matters they might have,"
"The computer system is not damaged and all documents are in a safe location with us.
"The files were not harmed by the explosion, the subsequent fire or from water damage when the fire fighters put the flames out."
Treasury officials said even though the 12th floor was gutted after the aircraft crashed into that level, the file room was not damaged.
Siyambalapitiya said government engineers had given the finance ministry the green light to re-occupy the IRD building.
"The IRD building wa