| Federal | |
| IRS | Federal tax information for small businesses. Get a EIN |
| Massachusetts | |
| Corporations Division | Rules and regulations for doing business in MA with downloadable forms |
| Dept of Revenue | Paying taxes in MA |
| New Hampshire | |
| Corporations Division | Rules and regulations |
| Forms | Downloadable forms |
| Dept of Revenue | Paying taxes in NH (business) |
| Taxes in NH | More on taxes in NH (personal) |
| Immigration | |
| Consular Affairs | |
| Visa Services | |
| INS | |
| Foreign Entry Requirements | |
| Key Officers Overseas | |
| General visa information | 202-663-1225 |
| Cut-off Dates for immigrant visa petitions | 202-663-1541 |
| E/H/I/L/O/P revalidation | 202-663-1225 |
| Border post appointments | 1-900-443-3131 |
| INS forms line | 1-800-870-3676 |