When i buy it from a cement supply house they charge me sales tax but when i buy it from home depot or lowes they dont. My accountant told me to be careful since i am responsible for paying my taxes.
Yes. Everything gets taxed. Are you sure Home Depot or Lowes don't charge you tax at the register? That's odd if they don't.
Do you have a sales tax exemption certificate on file at HD and Lowes, but not at your supply house? If you are not reselling the cement and charging sales tax you are responsible to pay the sales tax to the state. If you charge sales tax the amount you remit can be reduced by the amount of tax you pay to your supply house.
Generally, sales tax is due on cement because it is tangible personal property. Why are you buying cement is the more pertinent question. Are you a contractor? Do you resell cement? There could be many reasons that you could be buying cement withbeing charged sales tax. If you presented Lowes or HD a tax exemption certificate, that is why they are not charging you sales tax. Next time you make a purchase from them, you can ask why they are not charging you sales tax. If you need to correct them, you can always withdraw any tax exemtp status that you have with them.
