This might be a long shot, but we're trying to submit our sales invoices to tax auditors. They want each invoice rolled up ideally. In a perfect world it would be one item per invoice for the sake of simplicity and summarizing our activity. However, each invoice has multiple lines, on those lines there can be multiple tax jurisdictions for each item line for depending on nexus, state etc. It's proving to be a nightmare and throwing the whole implementation into doubt. Any directions on what approach can be taken would be great

what's wrong if you provide to tax auditor several data lines for one invoice? Just make a saved search and group those lines according different taxation rules and that's it.

I wish it was that simple. For each nexus (state) there are different tax rules depending on use

but I suppose the tax code on each invoice line corresponds to each of tax rules?