You inquired as to what is the income tax rate of an LLC's (sole membership) or if it is 22%. There is no flat rate of taxes for LLC income. The IRS treats as single member LLC as a disregarded entity. You report the income and expenses of the LLC in schedule C of your Form 1040 (Personal taxes). The LLC income is added to all your other income and allowable deductions are taken to arrive at taxable income. The tax rate depends on the amount of taxable income and your tax bracket.
If you have self employment income you will need to compute the self employment tax (15.3%) . You will be able to deduct in your tax return between 50%-57% of the self employment tax as an expense. See below the link to self employment tax article. https://turbotax.intuit.com/tax-tips/self-employment-taxes/tips-to-reduce-self-employment-taxes/L9K7.... Just to clarify the self employment tax is a tax based on Self Employment income, not all income.
You are correct in estimating that if the self employment net income is $10,000 then the self employment tax would be $1,530.00, and approximately 50% of the tax would be deductible in calculating taxable income.
