BIR form 1601-FQ, or the Quarterly Remittance Return of Final Income Taxes Withheld is a tax form which is used to remit all other forms of final withholding taxes.
Much like form 1601EQ, 1601-FQ forms can be used in remitting taxes withheld for the 3rd month of the quarter, in accordance with the provisions listed within the TRAIN law.
Know more about BIR Form 1601-FQ.