One of the things that John Hyre mentioned was keeping your LLC corporate books up todate. If you elect to take the deminimus deduction of $2500 or less, you should have a policy update in your books. He also said not to back date stuff - just have a line that says what you are doing and sign with current date.
Here is an example of a one I have used
FINANCIAL POLICY UPDATE OF XXXXKE, LLC
Effective January 1, 2018 and all years moving forward
For both book and tax purposes, the company shall:
a) expense assets costing $2,500 or less on a “per- invoice” or “per-invoice listed item” basis and b) expense assets with an estimated economic useful life of 12 months or less.
This, the 29th day of December, 2018.
________________________________
John Smith, Member/Manager
--65.188.xxx.xxx