That would be a bad idea and will possibly trigger audit depending on the amount. Within your range, nobody will probably notice that, but it's still bad idea.

Also if you haven't got 1099-K form (and IRS haven't got it) from Coinbase, reporting it to IRS can be a trigger of audit as well. No joke, they may even refund you this money back in a year/two with interest - under certain limits it's all done automatically with no humans involved on their side.