I recall seeing the 2016 return posted here earlier this year as I offered some comments about it. Seeing your reminder of the 2016 expense numbers and reviewing TLL's returns for both 2015 and 2016 makes me curious where the $250k in receipts and $187k in travel expenses mentioned in the stream came from since they don't match up to either tax return.
Because I wasn't sure if anyone actually archived the PDF versions of TLL's two tax returns to date, I uploaded both to mixtape.moe (links follow at the end of the post).
Since I hadn't yet looked at the 2015 return in any detail, I checked it for this reply and noticed a peculiar item. The return lists an amount of $66,666 for Other Expenses - an entry that requires a summary on Schedule O (a free-form schedule for explaining or itemizing various line items on a 990 return). There is
no Schedule O attached to the PDF version of the 2015 return, however, meaning the public has no idea what those other expenses are. I'm not sure if this is a mere oversight or an intentional omission. Because it looks like Greta prepared the return herself, I'd say either is possible.
Finally, it looks like TLL is using the calendar year for accounting purposes (year ending December 31). Consequently, its 2017 Form 990 would have been due May 15 unless TLL filed for a six-month extension. Assuming that happened, the return would need to be sent to the IRS on or before November 15.
Links to TLL Tax Returns:
[1] TLL 2015 990 EZ Return -
https://my.mixtape.moe/atyrzf.pdf
[2] TLL 2016 990 Return -
https://my.mixtape.moe/qkumqg.pdf