is it too late to file? wouldn't this be an automatic change under rev proc 2018-31 section 15.01?
When and Where To File
Automatic change requests. Except if instructed differently,
you must file Form 3115 under the automatic change procedures
in duplicate as follows.
• Attach the original Form 3115 to the filer's timely filed
(including extensions) federal income tax return for the year of
change. The original Form 3115 attachment does not need to be
signed.
• File a copy of the signed Form 3115 to the address provided
in the address chart on this page, no earlier than the first day of
the year of change and no later than the date the original is filed
with the federal income tax return for the year of change. This
signed Form 3115 may be a photocopy. For more on the
signature requirement, see the Name(s) and Signature(s)
section, later.
however, for the taxpayer, he should consult a tax pro that can look over his books and records. without seeing them it's really difficult to give proper advice.
i question as to whether or not some of the expenses he incurred would be properly treated as prepaid expenses and thus under the accrual method not deductible until 2019. the next question is the proper amount of revenue to recognize in 2019.
further the tax pro could discuss future years because if he changes methods he's sort of stuck with it for future years and may find it extremely disadvantageous.
