Are you working as an independent contractor? If so, you are self-employed, and will be paying self-employment tax, and you will be completing a Schedule C for your business expenses. You can still file a joint tax return with your spouse and do those things. Filing jointly is almost always better; you lose a lot of credits if you file separate returns.
You will need to use online Self-Employed software, or any version of the CD/download in order to prepare the Schedule C. All versions of the desktop (CD/download) have all forms and schedules, but only online Self-Employed has the Schedule C you will need. Your spouse's income can also be included when you use those versions, so that you can combine all of your income on a joint return just like you have in the past.
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922
https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax
https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c
https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct
https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
