My address changed in Jan. 2018. When filling out 2017 self-employment taxes, it asks what address I use for this side job. Do I use my current address or 2017 address?

I am filing taxes for both W2 (main source of income) and self-employment (very small side income). I'm asking in relation to the address used for my self-employment income. My current address (as of January 2018) is in a different state than my address for all of 2017.