I registered with the state of Indiana for a sellers permit and to remit sales tax because of their aggressive nexus requirements. I have no physical presence in the state, but some of my inventory does visit a warehouse in that state for packing and shipping (supposedly qualifying me for nexus). I am solely based in California.They require sales tax returns to be filed online, but their online system doesn't work. After numerous phone calls, attempts to get a verification code to work, attempts to get help from their technical support team and so on, it still won't active an online account for me. I filed a paper return (they relented and mailed one) for 2015. For 2016, they won't respond to my request for a paper return or technical help so I cannot file a return.They did not respond.Instead, they sent a collection letter for an absurd amount (about $700), which is nearly the amount of total gross sales in that state. I only owed about $40 in sales tax and I mailed the Dept of Revenue a check, which they CASHED. I also mailed a certified letter documenting the attempts to file and the lack of response and technical resolution.They did not respond.Recently, they sent another letter stating that I still owed about $700, which is patently false. A collection agency sent me a letter about this debt as well. They also sent a letter that said my sellers permit would not be renewed if I didn't pay this amount, which I do not owe.A agent called me and left a message about this "debt" they claim I have and asked for a call. I called, left a message, referenced the case number ***** how I paid the debt. They did not return my call.I'm rather lost at what to do next. Who can I report this to? Is there a federal agency that investigates extortion by a state agency?Should I attempt to close my business
in that state? (They threaten to refuse the application if their required documentation is not submitted -- documentation that simply does not exist for a sole proprieter small business
selling goods online.) I have formed an LLC
since the initial sales tax/seller permit registration so the sole proprieter business is indeed closed.Is there another remedy to this situation where they do not respond to phone calls, emails, faxes and certified letters?