While SB 164 includes several changes, the most notable update is for fiscal year-end taxpayers filing their Corporate Activity Tax (CAT). For the 2021 calendar year, taxpayers using a federal tax year other than the calendar year must register with the Oregon Department of Revenue and file a short year tax return.
The short year tax return applies from January 1, 2021 to the last day of the federal tax year ending in calendar year 2021. The 2021 short year tax returns must be filed by April 15, 2022. Taxpayers will need to prorate their CAT calculations for the number of days for which the short year tax return applies. Once filed, this will allow fiscal year-end filers to align their income tax return with their Oregon CAT.