Sales you make for RESALE customers do not require you to collect sales taxes. You need to keep a copy of their sales tax paperwork as proof.
You must claim that income on your income tax, of course.
What you have to claim on your taxes is the income you collected on the sale -
$ 5,999.00, on your Schedule C, assuming of course you are self-employed.
The mistake you did make was to accept a “sellers permit”. What you should have collected from your customer is a “resale certificate”. Resale certificates
are issued if the personal property you are selling will be resold.
If you sell property for resale, you must obtain a resale certificate. Otherwise,
if you sell to someone who is the “ultimate consumer”, then you must charge them sales tax.
Yes, keep the copy she gave you. The documentation required for a tax exempt sale varies from state to state, but a copy of the sellers permit should be sufficient if taken in good faith (you have no reason to believe the purchase was for personal use and not for resale).
They MUST BE Tax Exempt for this to happen as you HAVE to Report the Sale at the end of the year at TAX time. They will have a Tax Exempt Number they have to GIVE you for your Records.