Filing Taxes in the US

Hi, all. I’ve searched around a lot but am not really getting any clear answers.

The deadline to file taxes for Americans living abroad is in June.

As you all know, the pay here for teaching English is relatively low and given this is my only source of income, I would expect this process to be pretty straightforward. But H&R Block and other services request huge fees for international filing.

My question is, how do you guys file your taxes? Do you know of any way to do it for free or at a reasonable price?

Thank you! :)