Self employed

Hello again, Thank you for clarifying you question! 

For hobbies - If your activity is classified as a hobby, you will have to report any income you make from that hobby on your personal tax return, Form 1040, on Schedule 1, line 8, “Other Income.” This income would be subject to income tax, depending on your tax bracket. 

Federal Marginal Rates for Single filers and Married Jointly: For tax year 2022, the top tax rate remains 37% for individual single taxpayers with incomes greater than $539,900 ($647,850 for married couples filing jointly).

The other rates are:
35%, for incomes over $215,950 ($431,900 for married couples filing jointly);
32% for incomes over $170,050 ($340,100 for married couples filing jointly);
24% for incomes over $89,075 ($178,150 for married couples filing jointly);
22% for incomes over $41,775 ($83,550 for married couples filing jointly);
12% for incomes over $10,275 ($20,550 for married couples filing jointly).
The lowest rate is 10% for incomes of single individuals with incomes of $10,275 or less ($20,550 for married couples filing jointly).

Self-Employment income - is subject to both income tax and also self-employment tax of 15.3%. The 15.3% is a Federal "self-employment" tax. The rate consists of two parts: 12.4% for social security (old-age, survivors, and disability insurance) and 2.9% for Medicare (hospital insurance).  Yes, this must be paid and this is in addition to income tax.  Self-employment tax is a tax consisting of Social Security and Medicare taxes primarily for individuals who work for themselves. It is similar to the Social Security and Medicare taxes withheld from the pay of most wage earners. However, you figure self-employment tax (SE tax) yourself using Schedule SE (Form 1040 or 1040-SR). Also, you can deduct the employer-equivalent portion of your SE tax in figuring your adjusted gross income. Wage earners cannot deduct Social Security and Medicare taxes.