<s>[INST] What are the possible reasons for difficulties faced in filling responses to the notice u/s 133(6) of the IT Act, 1961? [/INST] Common reasons:

• Response of Taxpayer is to be submitted on compliance portal which is accessible via e-filing portal(www.incometax.gov.in). Other portals of Income Tax Department are for other specified compliances and will not accept responses to notice under e-Verification Scheme.

• Web browser used by the taxpayer is not updated to the latest version and hence the website is not supported by the browser.

• POP-UP Blocker of the web browser is enabled and it is blocking the access to the response window. </s>