I have helped a number of people deal with FR's.
One person got FR'd, he said on apps he made 30K but in IRS forms he only reported 6. They gave him a 3K spending limit.
Another trick I have learned is that if you tell them you filed an extension on your tax returns, they only want your bank statments. Tell them you checked with your accountnat and he said he filed a six month extension. (That means he just finished them Oct. 14,) He just would have sent them in so they are not yet available. They will want your bank statments and if you have a average balance of around 5K, you should be fine.