If someone rents church space to produce plays and charges admissions is this earned income and taxable if over 400 is made?

This sure does sound like some sort of business operation that is going on from the above enclosed information.

This self employed someone should probably use the below enclosed information.

That someone will need to report that income, and any related expenses, on Form 1040, Schedule C, Profit or Loss from the Business operation, or that someone may qualify to use Form 1040, Schedule C-EZ, TO determine that someones Net Profit from the Business operation. That someone will also need to use the Form 1040, Schedule SE, Self Employment Tax form to compute and report that someone social security and Medicare tax on the net profit from the business operation.

For instructions and forms go to the IRS gov web site and use the search box for publication 334 Tax Guide for Small Business a very good place to start with examples

Publication 463 Travel, Entertainment, Gift, and Car Expenses

Use the search box at the IRS gov web site for Small Business and Self-Employed Tax Center

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