Quick answer
Compare whether the service prepares Form 8802, checks required attachments, separates Pay.gov proof from IRS processing, offers fax or mail handling, and explains signer authority. Tax Paperwork is a browser-local draft preview; it does not pay, upload, submit, fax, monitor, or issue Form 6166.
Service comparison checklist
| Question | Why it matters | Tax Paperwork boundary |
|---|---|---|
| Does the provider submit or fax the package? | Submission handling is different from preparing a draft. | Tax Paperwork does not submit, fax, mail, or upload Form 8802. |
| Are Pay.gov records separated from application proof? | IRS guidance separates payment/upload mechanics from processing. | Tax Paperwork can explain the distinction but does not manage Pay.gov. |
| Who checks attachments and signer authority? | Entity, treaty, and authorization facts can change requirements. | Tax Paperwork does not validate authority or treaty eligibility. |
| Who monitors Form 6166 timing? | Foreign withholding and treaty deadlines may be time-sensitive. | Tax Paperwork does not monitor status or receive IRS correspondence. |
Source and advice boundary
This page is education-only and not tax, legal, accounting, filing, payment, mailing, faxing, upload, confirmation, or representation advice. IRS.gov and current official instructions control Form 8802 mechanics.
What to check next
Use IRS Form 8802 and Form 6166 sources to decide whether a local draft checklist is enough or whether the timing, treaty, entity, attachment, or authority facts need professional help.
Tax Paperwork can help organize public-preview draft context for some narrow workflows, but the user remains responsible for official-source review, professional advice when needed, and customer-controlled submission records.
Common risk
The common mistake is treating a draft, checklist, payment receipt, upload receipt, mailing receipt, or third-party summary as IRS confirmation. Keep records, but verify official channel rules and follow-up through IRS.gov, official correspondence, or qualified professional help.
Official source starting points
Last updated June 24, 2026.