/sys$common/syshlp/helplib.hlb FORTRAN, Format Specifiers, TL  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  TLn (Tab Left n Positions)

  Indicates that the next character to be transferred to or from a
  record is the "n"th character to the left of the current character.

  The value of "n" must be greater than or equal to 1.

  If the value of "n" is greater than or equal to the current
  character position, the first character in the record is specified.