Please refer the steps for Section 80C.

Login to your Cleartax account.
Go to "Deductions" Tab.
Fill the details of investment made under Sec 80C

Please remember that e -filing is paperless filing. There is no requirement to upload any investment proof while e filing.

Where do I enter deduction in respect of LIC?

Login to cleartax>Start filing your return>Deduction>Deduction u/s 80C