April 15 – The Normal April 15 Tax Filing Due Date has been Extended to July 15, 2020 due to the CVOVID-19 Outbreak
This includes the following:

Individual 2019 tax returns, 1040 and 1040-SR, and associated tax payments
April installment of 2020 estimated tax payments (pending legislation may extend the payment to October 15, 2020)
Household Employer Schedule H
Calendar year 2019 C corporation income tax returns, and associated tax payments
Calendar year 2020 C corporation estimated tax payments
2019 Fiduciary Returns
IRA contributions for 2019 are due. At this time, it is not clear if the postponement that applies to the 1040 and 1040-SR also apply to IRA contribution. To be safe make the contribution by the April 15 deadline.

April 15 – Social Security, Medicare and Withheld Income Tax
If the monthly deposit rule applies, deposit the tax for payments in March.
April 15 – Non-Payroll Withholding
If the monthly deposit rule applies, deposit the tax for payments in March.
April 30 – Social Security, Medicare and Withheld Income Tax
File Form 941 for the first quarter of 2020. Deposit or pay any undeposited tax under the accuracy of deposit rules. If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter in full and on time, you have until May 11 to file the return.
April 30 – Federal Unemployment Tax
Deposit the tax owed through March if it is more than $500