The first step is to determine whether the person is an independent contractor or an employee to the PTO--their status to the school as an employee isn't necessarily relevant. The IRS does have some good info on its website, but I think this article is a pretty good summary.
www.wwwebtax.com/general/independent_contractor.htm
If you assume for a minute that it's a pretty cut and dried case that the person is an independent contractor, then in the perfect world you should write up an agreement with the person and provide them with a W-9 form before their class starts. Pay them however your agreement says they are supposed to be paid, after you are sure you have their W-9. At the end of the year, before you distribute your 1099, I think it's a good idea to contact the person and review their 1099 info with them before you submit it. This is an extra step that's not really necessary, but corrected 1099s are a major pain to file. File the 1099, preferably with a service that does it all electronically and handles the filing of the 1096 form that needs to go with it; I like
www.filetaxes.com
.
If they're not an independent contractor, then it's more complicated, and somewhat dependent on state laws. But generally you have to go through the following steps--
-have the person complete an I-9 form, which usually requires you to look at documentation determining their citizenship, like a passport, drivers license, birth certificate
-register as an employer with the state, which will generally get you set up for state withholding
-determine whether your state has requirements for reporting new hires, and report them as necessary
-calculate the employee's pay after deducting for things like Federal, state and local withholding
-file state and Federal unemployment tax returns and possibly pay Federal an d state unemployment tax
-file regular withholding tax returns at the Federal and state level, probably quarterly with an annual reconciliation
-possibly be required to purchase workers compensation insurance
-probably some more things that aren't coming to me off the top of my head
That's a pretty scary list! If a PTO finds itself in a situation where a school employee is providing the after school program, and determines that the person should be treated as an employee, not an independent contractor, it would be worthwhile to have a conversation with the school district. Perhaps it could be worked out where the district paid the person for the time on the district payroll system, and then the PTO worked out a reimbursement arrangement with the school system.
Disclosure--Technically I'm 'retired,' and no longer licensed to practice.