You should not repeat the treatment you have already made indoors using Talstar P. You can use Talstar P for flea control outdoors at a rate of 1 oz per 1000 sq ft around turf and ornamentals. Indoors, you can use a steamer or carpet cleaner to break down some of the residual application. At least 14 days after that application, we recommend retreating with a product for indoor flea treatment such as PT Alpine Flea and Bed Bug Aerosol. Be sure to vacuum well before spraying and then every day or every other day after. Please refer to our online Flea Treatment Guide for more tips on eradicating this pest.
Talstar P CANNOT be applied to anything that you will come into prolonged skin contact with, so you cannot apply it to furniture. It should be applied to cracks and crevices and perimeter of the rooms only. For treating sensitive areas like your furniture, you should use Steri-Fab which is labeled for ticks and fleas as well as many other pests and can be applied to furniture, mattresses, pet beds, and all other sensitive areas. Below is a great article on treating indoors and the products that we would recommend for treatment inside the home for fleas and/or ticks.
http://www.domyownpestcontrol.com/fleas-and-ticks-t-10.html
http://www.domyownpestcontrol.com/outdoorindoor-flea-kit-p-1349.html
http://www.domyownpestcontrol.com/tick-control-kit-p-2924.html
Talstar P could potentially harm earthworms and other benficials should they come in contact with it; however, a surface application would not get deep enough into the soil for this to be an issue. Keep in mind, also, that earthworms have a coating that protects them from exposure to many products that would easily kill insects.