Itemizing refers to personal deductions, such as medical expenses, mortgage interest and property tax on your home, and charitable contributions. Itemized deductions are reported on Schedule A. If a married couple file separate tax returns and one spouse itemizes personal deductions, the other spouse must itemize them as well.
Business expenses are a separate matter. Because you are considered self-employed for the the income reported to your on a Form 1099-MISC, you will file a Schedule C, Profit or Loss from Business. Schedule C is used to report your business income and expenses. You will also file a Schedule SE, Self-Employment Tax. Unless you pay estimated taxes quarterly during the tax year, the taxes on your self-employment income are due when you file your tax return.
The election to file separately or jointly depends on your particular circumstances. See the FAQ below for more information about Married Filing Separately versus Married Filing Jointly.
https://ttlc.intuit.com/replies/3288477
