• Summit Bookkeeping

September 2021 | Important Dates & What's New

Happy September! Check out the list below to see important dates that you may want to jot down:


Important Dates


September 15, 2021

  • Quarterly Estimated Tax Payment for Q3 — IRS

  • Extension Deadline for Partnership (1065) and S Corp (1120-S) Tax Returns — IRS

September 27, 2021

  • Monthly DOR Filers: Excise Tax Return — DOR

  • Monthly City of Bellingham Filers: B&O Tax Return — City of Bellingham

Please note that all businesses are different and you may have other deadlines that apply to you. If you have questions related to your business or industry, you should contact your accountant or bookkeeper.


What's New


Statewide Indoor Mask Mandate

Effective Monday, August 23, masks are required for everyone, including vaccinated individuals, in indoor settings. This mandate will apply to most public places across Washington state, such as restaurants, grocery stores, malls, and public-facing offices. You can find the latest L&I requirements and guidance here.


Federal Pandemic Unemployment Benefits Expire Sept. 4

Unemployment benefits that have been expanded due to COVID-19, including PUA, PEUC, and the extra $300 per week, are set to expire on September 4, 2021. This may affect your future tax rate as some claimants transfer to regular unemployment benefits and your offers of employment or re-employment. Learn more about the ESD's COVID-19 business information and refusal of work.


Employee Retention Credit Update

The IRS and Treasury Department have provided additional guidance for employers who will claim the employee retention credit for the third and fourth quarter of 2021. Learn more here.



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