When did you send your form?
Wait for 1.5 to 2 months , ICAI will not send you intimation of receipt of form.
You can download your revalidation letter from ICAI.org in student/member services section which is provided at bottom of the page of ICAI website after 1.5 months, if letter will not generate then contact ICAI Chennai or nearest chapter office with photocopy of documents you have sent to ICAI.
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