I can't afford to pay US taxes on my German unemployment

Hi all, recently minted dual citizen here. Eighteen months ago my German company had massive layoffs, paired with a divorce and I have been on German federal unemployment for that period. From what I understand online, it's not subject to the tax reciprocity agreement.

With conversion to USD it's probably around 18,000USD total, which, because it is above the threshold, means I have to pay in the 10 percent class of taxes on it back in the States. Not only will it cost me to move money back to my American account, which stands empty, I just don't have any money to pay it, because UNEMPLOYMENT.

I think it should come out to just a couple hundred dollars, but I've already sold furniture, clothes, valuables, just to make ends meet. I am very unfamiliar with the American tax situation, other than regular filing from my low-paying job here in Germany and can't seem to find a software compatible with my situation, so I will do fillable forms.

How does tax payment work when I can't afford it?