After the file is prepared, the file is to be validated using NSDL’s File Validation Utility (FVU). Please ensure that JRE Version 2.00 or higher has been installed on your local system to run TDS_FVU . Java can be downloaded from website http://WebTDS.in/downloads.htm
After JAVA is installed, then click on Validate File.
The following screen will be displayed:

The input screen of FVU has two fields viz; 'Input File' and 'Error/Upload & Statistics Report File'.
Input File Name and Path
Specify the name (with the .txt extension) of the input file (including the path) i.e. the name of the e-TDS/TCS statement prepared as per file format to be validated by the FVU.
Input filename should not be more than 12 characters (including the .txt extension) and should not contain any special characters eg. : , \ / etc.,.
For example file name can be FORM27EQ.txt.
Error/Upload & Statistics Report File Path
Specify the path where either an ‘error’ or ‘upload’ & ‘statistics report file’ generated by the FVU on completion of validation of the statement should be saved. The path can be same as the input file path or different.
Do not specify any file name, only provide the path.
It is mandatory to fill both these fields.
Deductor/collector can enter or select the input file (e-TDS/TCS) to be validated by using the ‘Browse’ button on the extreme right of the 'Input File Name and Path' as in figure 1.
Figure 1

In the example above the path of the ‘Input File Name with Path’ chosen is D:\2005-06\returns\27EQGov.txt (figure 2).
Figure 2

NOTE: The ‘Input File’ needs to be a text file i.e. with extension ‘txt’
Specify the path where either the ‘Error’ or ‘Upload’ & ‘Statistics Report File’ generated on validation through the FVU should be saved by either entering or using the browse button on the extreme right of the ' Error/Upload & Statistics Report File’ field. The path can be same as the input file path or different (figure
3). Do not specify the file name.
Figure 3

In the above example the ‘Error/Upload & Statistics Report File’ will be saved at the same path as the Input File i.e. D:\2005-06\returns.
In case the input file is invalid, FVU will generate two files:
27EQGoverr.html
27EQGov.err (text file)
27EQGoverr.html is an ‘Error ’ file generated in html format with the same filename as the input file with err appended after the file name and html as extension (figure 4). Example, the input file name is 27EQGov.txt, the error filename will be
‘27EQGoverr.html’. The error file will contain details of erroneous records like line number, record type, batch number, challan number, deductee/salary detail number, along with the error code and the corresponding error description. The line numbers of the records in the error file will be the line number in the input text file.
27EQGov.err is a carat separated text file with .err as extension (filename will be the same as the input file). This text file will also get generated with the same information as the html file |