How do I file quarterly business taxes

[Bsch4477]

I assume that you are asking about self employment tax estimated payments. 

https://www.irs.gov/businesses/small-businesses-self-employed/self-employed-individuals-tax-center

[Vanessa A]

Click here to make  quarterly estimated payments to cover your SE taxes of 15.3%.

If you use a program like QuickBooks, it will tell you how much you owe and when they are due, which is generally the 15th day of the month after the quarter ends.