Notes about the T99 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The T99 file type is primarily associated with 'Kiplinger Tax Cut File'. 1999 Tax Year. Note: Kiplinger Tax Cut State Return Files are of the form .T?? where ?? is the two-character state designation.