Currently I live in Oklahoma and have just started doing some software development for a few local businesses. Already registered a single proprietor LLC and obtained my EIN. I have not engaged a tax accountant yet and I just recognized my first revenue. Do I need to collect sales tax on the consulting services? No tangible products, besides code, is being delivered... What about other taxes...?
You likely will not need to pay or collect sales tax for services rendered. That said, you should check with an accountant. Other taxes/filings to watch out for (this is by no means exhaustive, as I said in my comment, I highly recommend checking with a local accountant):
- City/County Business License
- Annual Report
- Payroll tax (depending on how you pay yourself)
- Franchise & Excise tax (if applicable, this depends on the state)
You generally do no add sales tax to products that you buy ( already taxed ). This is classified by the IRS as a pass-through tax.
Similarly you do not tax your own labor. You do however charge your client for taxes paid if you supplied them material that you paid taxes on.
If you engage in the making of raw materials that is sold then that would be appropriate for a sales tax.
Read on up on the IRS pages. It's all there, for free.