I live in Texas, and I opened an online business via Shopify and acquired a Texas Sales and Use Tax Permit in order to purchase inventory wholesale. I have been paying my quarterly taxes to the state. I have three questions: 1. Do I need to acquire an EIN or anything on a federal level for my online business if I am the individual owner and only employee for federal tax purposes? 2. I sell on other platforms such as Poshmark and Mercari under my business name, so do I need to pay self-employment taxes apart from 1099-k taxes even if my total sales for the year are under $1000 and this is the only income I've had?
