Year-on-year data, accessed by PTI, shows that while a total of 3,21,61,320 e-returns were filed till October 31 last year the financial yearr 2016-17), the figure rose to 3,78,20,889 by this October-end (FY 2017-18).
This reflects an overall growth of 17.60 per cent in the number of people filing their ITRs online.
A senior Income Tax Department officer, supervising these activities, attributed the rise to the withdrawal of two high-value currency notes of Rs 500 and Rs 1,000 from circulation by the government on November 8 last year.
The data also reflects an increase of 23.28 per cent in the category of individual e-filers who use the basic ITR-1 form to show their income records to the taxman.
While 1,69,04,759 people filed ITR-1 online last year, the figure stood at 2,08,40,303 this year, the data revealed.
Online filing of ITR-2A, filed by those who having income from salary and other sources, saw an increase by 21.78 per cent as 28,82,189 returns were filed under this category till October this year as compared to 23,66,687 in the corresponding period last year.
"The spike in figures are due to demonetisation. The tax department had asked people to file their returns so that they are clean when it comes to making any transaction in the wake of the note ban," the officer said.
The I-T department has already chosen 20,572 tax returns for "detailed scrutiny" suspecting discrepancies in incomes before and after demonetisation, official sources said yesterday.