1099 Contractor tax in a Nutshell

Forms

1. Pay estimated state and federal tax using form 1040 ES for fed, IT-1040ES (ohio) for state every quarter .

Fed: http://www.irs.gov/pub/irs-pdf/f1040es.pdf
State: http://turbotax.intuit.com/support/kb/estimated-taxes/2000.html
OH 1040Es voucher : http://tax.ohio.gov/documents/forms/pass-through_entities/2007/PIT_IT1040ES.pdf

Medicare and social security tax is included in 1040 ES.

2. You can Pay medicare and social security tax using form 1040 SE while filiing your tax return.
http://www.irs.gov/pub/irs-pdf/f1040sse.pdf

3. + Other forms while filiing your tax return.

Tax due date for 1040 ES (fed and state of OH, other state due date may vary with fed)

The 15th day of the 4th month of your fiscal year, - April 15
The 15th day of the 6th month of your fiscal year, - June 15
The 15th day of the 9th month of your fiscal year, - Sept. 15
The 15th day of the 1st month after the end of your fiscal year. - Jan. 15 next year


How To Pay Estimated Tax

There are five ways to pay estimated tax.

1. Credit an overpayment on your 2007 return to your 2008 estimated tax.
2. Send in your payment (check or money order) with a payment voucher from Form 1040-ES.
3. Pay electronically using the Electronic Federal Tax Payment System (EFTPS).
4. Pay by electronic funds withdrawal if you are filing Form 1040 or Form 1040A electronically.
5. Pay by credit card using a pay-by-phone system or the Internet

Source : http://www.irs.gov/publications/p505/ch02.html#d0e6025