A discussion paper on exploring new areas in revenue mobilisation, prepared for the two-day annual conference of chief commissioners and directors general of income tax held on June 11 and 12, says: "Retrospective tax changes due to the apex court decision on Vodafone, and GAAR provisions, are dampening the sentiments of non-resident Indians and foreign residents.
"That will affect liquidity in the market and rupee may fall further."
A senior official of the department said the papers were prepared after serious deliberations, and the I-T department's admission on these measures at this juncture could be significant pointers to achieving the direct tax collection target for 2012-13.