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Show HN: A unique twist on Tetris and block puzzle

https://playdropstack.com/
1•lastodyssey•3m ago•0 comments

The logs I never read

https://pydantic.dev/articles/the-logs-i-never-read
1•nojito•4m ago•0 comments

How to use AI with expressive writing without generating AI slop

https://idratherbewriting.com/blog/bakhtin-collapse-ai-expressive-writing
1•cnunciato•5m ago•0 comments

Show HN: LinkScope – Real-Time UART Analyzer Using ESP32-S3 and PC GUI

https://github.com/choihimchan/linkscope-bpu-uart-analyzer
1•octablock•6m ago•0 comments

Cppsp v1.4.5–custom pattern-driven, nested, namespace-scoped templates

https://github.com/user19870/cppsp
1•user19870•7m ago•1 comments

The next frontier in weight-loss drugs: one-time gene therapy

https://www.washingtonpost.com/health/2026/01/24/fractyl-glp1-gene-therapy/
1•bookofjoe•10m ago•1 comments

At Age 25, Wikipedia Refuses to Evolve

https://spectrum.ieee.org/wikipedia-at-25
1•asdefghyk•12m ago•3 comments

Show HN: ReviewReact – AI review responses inside Google Maps ($19/mo)

https://reviewreact.com
2•sara_builds•13m ago•1 comments

Why AlphaTensor Failed at 3x3 Matrix Multiplication: The Anchor Barrier

https://zenodo.org/records/18514533
1•DarenWatson•14m ago•0 comments

Ask HN: How much of your token use is fixing the bugs Claude Code causes?

1•laurex•17m ago•0 comments

Show HN: Agents – Sync MCP Configs Across Claude, Cursor, Codex Automatically

https://github.com/amtiYo/agents
1•amtiyo•18m ago•0 comments

Hello

1•otrebladih•20m ago•0 comments

FSD helped save my father's life during a heart attack

https://twitter.com/JJackBrandt/status/2019852423980875794
2•blacktulip•22m ago•0 comments

Show HN: Writtte – Draft and publish articles without reformatting, anywhere

https://writtte.xyz
1•lasgawe•24m ago•0 comments

Portuguese icon (FROM A CAN) makes a simple meal (Canned Fish Files) [video]

https://www.youtube.com/watch?v=e9FUdOfp8ME
1•zeristor•26m ago•0 comments

Brookhaven Lab's RHIC Concludes 25-Year Run with Final Collisions

https://www.hpcwire.com/off-the-wire/brookhaven-labs-rhic-concludes-25-year-run-with-final-collis...
2•gnufx•28m ago•0 comments

Transcribe your aunts post cards with Gemini 3 Pro

https://leserli.ch/ocr/
1•nielstron•32m ago•0 comments

.72% Variance Lance

1•mav5431•33m ago•0 comments

ReKindle – web-based operating system designed specifically for E-ink devices

https://rekindle.ink
1•JSLegendDev•35m ago•0 comments

Encrypt It

https://encryptitalready.org/
1•u1hcw9nx•35m ago•1 comments

NextMatch – 5-minute video speed dating to reduce ghosting

https://nextmatchdating.netlify.app/
1•Halinani8•36m ago•1 comments

Personalizing esketamine treatment in TRD and TRBD

https://www.frontiersin.org/articles/10.3389/fpsyt.2025.1736114
1•PaulHoule•37m ago•0 comments

SpaceKit.xyz – a browser‑native VM for decentralized compute

https://spacekit.xyz
1•astorrivera•38m ago•0 comments

NotebookLM: The AI that only learns from you

https://byandrev.dev/en/blog/what-is-notebooklm
2•byandrev•38m ago•2 comments

Show HN: An open-source starter kit for developing with Postgres and ClickHouse

https://github.com/ClickHouse/postgres-clickhouse-stack
1•saisrirampur•39m ago•0 comments

Game Boy Advance d-pad capacitor measurements

https://gekkio.fi/blog/2026/game-boy-advance-d-pad-capacitor-measurements/
1•todsacerdoti•39m ago•0 comments

South Korean crypto firm accidentally sends $44B in bitcoins to users

https://www.reuters.com/world/asia-pacific/crypto-firm-accidentally-sends-44-billion-bitcoins-use...
2•layer8•40m ago•0 comments

Apache Poison Fountain

https://gist.github.com/jwakely/a511a5cab5eb36d088ecd1659fcee1d5
1•atomic128•42m ago•2 comments

Web.whatsapp.com appears to be having issues syncing and sending messages

http://web.whatsapp.com
1•sabujp•42m ago•2 comments

Google in Your Terminal

https://gogcli.sh/
1•johlo•43m ago•0 comments
Open in hackernews

Ask HN: Costs for US sales tax compliance for a two-sided marketplace

4•throway-9998888•4mo ago
I'm consulting for a US-only startup that has approximately 2000 sellers. We don't yet facilitate payments on site because we are worried about not being sales tax compliant. But now we're thinking about biting the bullet.

Assuming we sell into all states and that our transaction volume will reach $10 million USD, what would be the cost of calculating, collecting, and remitting sales tax to the relevant states, counties, and cities?

Assume too that we only sell one type of product (i.e. we are a specialist marketplace not a general one).

It might be worth separating into setup and recurring costs.

Any surprises in store? Or recommendations in terms of tooling or vendors?

Comments

mtmail•4mo ago
Related "Ask HN: How do you handle VAT / Sales Tax accounting as B2C SaaS?" https://news.ycombinator.com/item?id=43298663
gethly•4mo ago
Don't. By that I mean, do not get involved in the tax burden yourself. Let the sellers, which are businesses, manage their own taxes. This is what I am doing with my own project. Amazon and few others have taken up on themselves to make life of their sellers easier by handling taxes for them, especially for EU, but i see no reason for it whatsoever.

Businesses should be businesses and handle their own taxes and legal obligations by themselves.

Additionally, if you get involved in between the seller and the buyer, YOU are now liable when it comes to taxes, as you become de-facto the seller, you have to handle returns/refunds(including the tax aspect and have to handle already paid taxes in such cases as well), audits and other legal aspects. There is simply no good reason why you should involve yourself in this whatsoever. Just facilitate the business transaction, but not the financial transaction.

ricardonunez•4mo ago
I would not handle that myself as somebody else mentioned. Good a small business that can be a killer. That said, done stripe or paddle handle that?