You can check on TRACES if deductor has filed quarterly statement and whether the statement contains details for your PAN. This functionality can be accessed by Tax Payer without logging in to TRACES.
Click on ‘View TDS / TCS Credit’ link under Quick Links in Tax Payer tab in TRACES home page. Enter details as requested on the screen and proceed. ‘Remarks’ will specify if quarterly statement (for the inputs entered by you) has been filed by deductor. ‘Count of Records Present’ indicates number of records for your PAN in the statement.