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88 Nashua Road
Londonderry, NH 03053
Contact Us:
603-434-6141
 
Fax:
603-434-0212

Tax Year 2018 Calendar:
Important Dates & Deadlines

Unless otherwise indicated, all deadlines are at 11:59:59 P.M.

(one second before midnight) local time.

 

January 15, 2019

  • Due date for fourth installment of 2018 estimated tax payments.

 

January 31, 2019

  • Employers Taxes - Employers of non-agricultural and non-household employees file return  on Form 941 for withheld income and FICA taxes in last quarter of 2018.  

  • Withholding - Employee's statements (Form  W-2 and Form 1099-R) for amounts withheld in 2018 to be furnished by employer to employees.

  • Employers must file Form 940, annual return of Federal unemployment taxes (FUTA) taxes for 2018.

March 15, 2019

  • Deadline for filing a 2018 S -Corporation or partnership tax returns or extension.

 

April 17, 2019

  • Deadline for filing a 2018 personal, C corporation and trusts tax returns or extension.

    • The return or extension must be postmarked or transmitted for e-filing by April 15, 2019.

    • To avoid late payment penalties and interest, any additional taxes you owe must be paid by this date even if you filed an extension. 

  • Due date for first installment of 2019 estimated tax payments.

 

April 19, 2019

  • Deadline for resubmitting or paper-filing a rejected federal return that was originally e-filed by the April 15 deadline if you did not file an extension.

    • Note: Although the last day to resubmit a rejected return is October 18, the April 19 deadline applies to taxpayers who owe taxes and want to avoid the late-filing penalty.

  • Deadline for resubmitting or paper-filing a rejected extension that was originally e-filed by the April 15 deadline.

 

June 17, 2019

  • Deadline for filing a 2018 personal return for U.S. citizens or residents living and working abroad, including military duty.

  • Due date for second installment of 2019 estimated tax payments.

 

September 17, 2019

  • Final deadline to file your 2018 S corporation or partnership tax return if you filed an extension.

  • Due date for third installment of 2019 estimated tax payments.

 

October 31, 2019

  • Final deadline to file your 2018 estate/trust tax return if you filed an extension.

 

October 15, 2019

  • Final deadline to file your 2018 personal or C corporation tax return if you filed an extension.

 

October 18, 2019

  • Final deadline to resubmit a rejected return that was originally e-filed on or before October 15.

    • If you're expecting a refund and miss the October 18 e-file cutoff date, you have until April 15, 2022 (October 15, 2022 if you filed an extension) to file a paper return and claim your 2018 refund

January 15, 2020

  • Due date for fourth installment of 2019 estimated tax payments.

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