Your numbers are screwy. Lets assume that you paid $4,800 for the year in SE tax ($400/month).I am paying about $400 a month in self-employment tax. This comes out to almost $5000 a year! This doesn't seem right. Am I missing something? I only make about $400 a week driving uber. I already pay a lot in service fees. Please help!
Since SE tax is 15.3%, that means that you made at least $31,372 ($4,800 / 0.153) for the year.
Assuming that you drove every single week and made the same amount every week, that means you made $600 per week ($31,372 / 52). If you took any weeks off, then your average for the weeks that you drove should be even higher.
There is absolutely no way that you should be paying $400 per month in SE tax if you are only making $400 per week. In order to pay that much in SE tax, you need to make at least 1.5x that amount.