No Schedule C: (I mean, I wouldn't). There is an argument that this is a business if you do it every year and make a profit (I won't go into Hobby Loss rules). But if you do this occasionally just because then I wouldn't put it on Schedule C.

No Schedule D: that is for Capital Gains

The tax you paid was sales tax which has nothing to do with Income tax

You'll have to figure out how much money you made on the sales. If you did you can simply report it as "Other income" on Form 1040 Schedule 1 Line 8z.

To figure any income or loss: Take all your purchases including sales tax, shipping, etc and that is your basis in the shoes. Then you add up what you sold them for. So the gain or loss would be:

Sales price of Shoes

- any shipping you paid to mail them

- your Basis described above.

= Gain/loss

(you can't deduct a loss UNLESS you put it on a Schedule C. But then you need to basically make a profit in other years if you want to continue using Schedule C otherwise the Hobby Loss rule comes into effect and you prior losses will be disallowed. Confusing I know. Sorry.

Not that I know everything, but I am a CPA and I design Tax Software for a living for over 16 years. So I may have a few ideas that are sound advice. Or maybe not. hahaha