The central board of direct taxes (CBDT) has taken the measure as the last two days of the month are Saturday and Sunday.
Also, March 27 and 29 are holidays owing to Holi and Good Friday and the offices would be closed then, an official said.
The CBDT has also asked all the chief commissioners of tax collection ranges to open additional counters to facilitate the taxpayers who would file their I-T returns for the 2012-13 fiscal.