Once you receive the email, you have to visit your Profile Page, where the announcement would be visible. In the same page, there would be an Invoice Format link which you have to download. Save the format, and fill up the required fields and save it as a document file.
Then visit the Payment Update page again. (You will get the link in your email itself) Upload the invoice, write a remark on the comments field and click on "update".
Your invoice will be uploaded and Techulator will transfer the invoice amount to your bank account.
So, you need an internet banking account, give the details in the invoice format and receive your payment, when TEC sends you the money.
Please feel free to ask if you are still having any doubt.
Knowledge is power.