An independent contractor pays the same sales tax rate as an employee but that is based on income less your business expenses. Here is tax rate schedule http://www.bankrate.com/finance/taxes/state-taxes-arizona.aspx
Income taxes are usually paid quarterly(federal and state) due dates are 4/15,June 15,Sept15 and Jan15
Remember with federal taxes you will pay social security and medicare taxes of about 15.3% in addition to income tax.
Disclaimer: Not a tax professional. Information gathered from internet links. Anything dated in June 2019 was posted in prior years and is before the 2019 limits and changes.
