Sorry you have to file a tax return for $400 of self employment income. Even though you won't pay income tax on it you will owe self employment tax.
For an IRA contribution. If you only have self-employment income you can only contribute up to your net profit reduced by the deduction allowed for one-half of your self-employment taxes. See IRS publication 590 http://www.irs.gov/pub/irs-pdf/p590a.pdf
A 1099NEC is for self employment income. Yes you are the owner of your own self employment business. You are in business for yourself. Use your own info. The people or company that pays you is your customer or client. You need to fill out schedule C for self employment business income. You are considered to have your own business for it. YOU are the business.
You will need to fill out 2 Schedule C. One for each kind of business.
To report your self employment income you will fill out schedule C in your personal 1040 tax return and pay SE self employment Tax. Here's a Schedule C https://www.irs.gov/pub/irs-pdf/f1040sc.pdf
You can enter Self Employment Income into Online Deluxe or Premier but if you have any expenses you will have to upgrade to the Self Employed version or use any of the Desktop CD/Download programs.
How to enter self employment income
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
You will need to keep good records. You may get a 1099NEC at the end of the year if someone pays you more than $600 but you need to report all your income no matter how small and if you don't get the 1099NEC. For the future, you should use a program like Quicken or QuickBooks to track your income and expenses. There is a QuickBooks Self Employment bundle you can check out which includes one Turbo Tax Online Self Employed return....
http://quickbooks.intuit.com/self-employed
You use your own records. You are considered self employed and have to fill out a schedule C for business income. You use your own name, address and ssn or business name and EIN if you have one. You should say you use the Cash Accounting Method and all income is At Risk.
After it asks if you received any 1099Misc or 1099NEC it will ask if you had any income not reported on a 1099Misc. You should be keeping your own records. Just go through the interview and answer the questions. Then you will enter your expenses.
Self Employment tax (Scheduled SE) is automatically generated if a person has $400 or more of net profit from self-employment. You pay 15.3% SE tax on 92.35% of your Net Profit greater than $400. The 15.3% self employed SE Tax is to pay both the employer part and employee part of Social Security and Medicare. So you get social security credit for it when you retire.
The SE tax is already included in your tax due or reduced your refund. It is on the 1040 Schedule 2 line 4 which goes to 1040 line 23. The SE tax is in addition to your regular income tax on the net profit.
Here is some IRS reading material……
IRS information on Self Employment
http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Self-Employed-Individuals-Tax-Center
Pulication 334, Tax Guide for Small Business
http://www.irs.gov/pub/irs-pdf/p334.pdf
Publication 535 Business Expenses
http://www.irs.gov/pub/irs-pdf/p535.pdf
