The site currently vomits up a really nice debugging page if the browser's localStorage is disabled (as my usual browser is). The gray text at the bottom suggests that you've got a "development" flag currently turned on in production. Might wanna check that.
I'm not 1099 currently, but I was for about 10 years and taxes are one of the 2 main things that eventually kicked me back to a regular job. I was terrible at keeping track of all the little charges and receipts for everything. Xero helped, but ultimately I ended up owing about $8k of taxes on $30k gross a few too many times and it just wasn't livable.
So I really hope you guys do well.