best filter for in door picture using outdoor film?

For tungsten lighting you need a blue 80B.

For strip-lights you need a Fl-D, your dealer can advise you, but remember the blue will require opening up two stops.

if you want daylight film to imitate tungsten film, then an 80A Wratten corrects 3200 tungsten to 5500 daylight. the 80A has filter factor of 4 or requires 2 f stops exposure correction. the 80B filter is for 3400 tungsten (theatrical lighting) and requires slightly less correction. Because of the correction, you will need very bright illumination, the equivalent of theatrical lighting, so you might be better off to use daylight film and make correction in photoshop. some people find the warm images that occur from using daylight film to be pleasing anyway.

That being said, tungsten film is not always the proper balance for indoor lighting either. If you are shooting stain glass windows, they are illuminated by skylight and are best shot with daylight film. most people take indoors pictures with flash, and unless you are using old fashion uncoated flash bulbs, your strobe is color correct for daylight film.