Just do the best you can on entering the physical location of the property. I have no doubt that at a minimum, you have a city, state and zip code for the location. If there is no street address, then check your county website for the parcel number of the land the drilling is occurring on, and for the street address enter the parcel number.
The physical street address is not all that important since the property is not depreciated. All that matters for royalty income as it relates to drilling, is depletion. For that, the address really doesn't matter as it plays no part in determining depletion.
