I am not a tax professional, but I can provide some general information that may help you. Please consult with a tax advisor or use official IRS resources for accurate advice tailored to your specific situation.

In the United States, if you earned $800 or more in self-employment income, you are generally required to file a tax return and report that income. As a self-employed individual, you would typically report your business income and expenses on Schedule C, which is attached to your Form 1040.

Even if your income is below the threshold for owing federal income tax, you may still need to file a tax return to report your self-employment income and potentially pay self-employment tax. Self-employment tax covers Social Security and Medicare taxes for self-employed individuals.

In California, you would also need to file a state tax return if you meet the filing requirements. California has its own tax forms and regulations, so you should review the California Franchise Tax Board's website or consult with a tax professional for specific guidance.

Regarding online filing options, the IRS provides a Free File program for eligible taxpayers with an income below a certain threshold. This program allows you to use tax software from participating companies to prepare and file your federal tax return for free. You can find more information and access the Free File software options on the IRS website (www.irs.gov).

For California state taxes, the California Franchise Tax Board offers CalFile, a free online filing option for eligible taxpayers. You can visit the CalFile website (www.ftb.ca.gov) to determine if you qualify and to access the online filing system.

Remember, it's important to consult with a tax professional or use official IRS and state resources to ensure you are meeting all your tax obligations accurately.