verilog-tab-always-indent

verilog-tab-always-indent is a variable defined in `verilog-mode.el'.
Its value is

t

• This variable is safe as a file local variable if its value
  satisfies the predicate `verilog-booleanp'.

Documentation:
Non-nil means TAB should always re-indent the current line.
A nil value means TAB will only reindent when at the beginning of the line.

You can customize this variable.