The Income Tax Department has written to another 35,000 people this week, asking them to file returns and pay dues. Income Tax Department has sent letters to them. With this, the department has issued letters in 2.45 lakh cases. It has identified 12 lakh people who do not file returns and is taking follow-up action on them. The department now proposes to extend this exercise to persons who have conducted high-value transactions during the 2010-11 and 2011-12 fiscal years, it added.The Finance Ministry is also developing a dedicated module on the e-filing portal which will give individual taxpayers details of returns not filed, ITR-V not submitted and demand not paid, among others, as a step towards greater transparency.