You need to file for reimbursement / claim for income tax, advance tax, withholding tax, etc. paid in excess with FBR. There is a proper procedure for it.
Check IRIS Portal, and internet, FBR website, Youtube, etc. for further details.
Hmmm... OK. In that case, Excise Office Islamabad can guide best in this regard, as in their system, they have a list of Nos.