Deductions & credits

Re: how to enter. 

You enter your self-employment income and expenses as you would if you were a in the US. It will show up on Schedule C and flow to your 1040 and Sch SE.

Then go through the foreign earned income exclusion (FEIE) interview and enter your SE income and expenses. See screenshots below.

Also the  FEIE is pretty complicated. For example if qualifying based on the 330 day test, only 1 day has to be in the tax year. Very odd. If you wind up with any US tax owed (other than SE tax) you might want to try the foreign tax credit instead of the FEIE. It is differently complicated and might be better. But if the FEIE gets rid of your US tax liability you're good.]

[Remember you must convert to USD. If only a couple of items you should use the actual exchange rate on the day. But for a lot of items or small items, you can use the average annual exchange rate. https://www.irs.gov/individuals/international-taxpayers/yearly-average-currency-exchange-rates]