| 9211 | Tapes, video, recorded, wholesale | |
| 1729 | Tapes, weaving | |
| 5131 | Tapestries, household furnishings, wholesale | |
| 5233 | Tapestries, household, retail | |
| 4540 | Taping and finishing drywall, contractors | |
| 1532 | Tapioca, manufacturing | |
| 5150 | Tapping attachments, wholesale | |
| 2922 | Tapping machines, metalworking, manufacturing | |
| 2893 | Taps and dies (i.e., machine tool accessory), manufacturing | |
| 3120 | Taps, current, attachment plug and screw shell types, manufacturing | |
| 2413 | Tar acid resins, manufacturing | |
| 2699 | Tar and asphalt paving mixtures, made from purchased asphaltic materials | |
| 2411 | Tar and tar oils, made by distillation of wood | |
| 2699 | Tar paper, building and roofing, made from purchased paper | |
| 2101 | Tar paper, building and roofing, made in paper mills | |
| 2699 | Tar paper, made from purchased asphaltic materials and paper | |
| 2699 | Tar roofing cements and coating, made from purchased asphaltic materials | |
| 1110 | Tar sand mining for oil extraction | |
| 2411 | Tar, made by distillation of coal tar | |
| 2310 | Tar, made in coke ovens | |
| 2320 | Tar, made in petroleum refineries | |
| 3530 | Target drones, aircraft, manufacturing | |
| 3693 | Target shooting equipment (except small arms and ammunition), manufacturing | |
| 3693 | Targets, archery, rifle, shooting, manufacturing | |
| 3693 | Targets, clay, manufacturing | |
| 3530 | Targets, trailer type, aircraft, manufacturing | |
| 7511 | Tariff board | |
| 6309 | Tariff consulting services | |
| 1721 | Tarpaulins, made from purchased fabrics | |
| 4520 | Tarring roads | |
| 1549 | Tartar sauce, manufacturing | |
| 2411 | Tartaric acid, manufacturing | |
| 2411 | Tartrates, not specified elsewhere by process, manufacturing | |
| 1729 | Tassels, textile, manufacturing | |
| 9309 | Tattoo parlours | |
| 5520 | Taverns | |
| 7511 | Tax (property) assessors' offices | |
| 7499 | Tax collection services on a contract or fee basis | |
| 7511 | Tax collection, local administration | |
| 7411 | Tax law attorneys, private practice | |