How do I get lipoma removed from temple?

It would be helpful to have a photo but in general lipomas can be removed through a carefully placed incision. Therefore, the final well healed scar is usually not a concern. As for a "dent", it's always a possibility and is determined by the size, how long it's been present, the depth if invasion, surrounding soft and bony tissue atrophy, etc. If a cosmetically unexceptable depression exists afterward, then it could potentially be improved with dermal fillers. Hope this helps.

Usually it is best to excise these directly and not try and get them out by an incision in the hairline that results in more dissection and ultimately more distortion. By direct I mean incise directly over the lesion and remove it and close it. making the incision along certain lines will make them less obvious. 

Depending on the size of the lipoma and how long it has been there, there might be a dent due to long term pressure of yhr lipoma.

The other issue is how to best approach it and where to put the incision.

If the depression persist, it can be filled or smoothed with fat graft.